Sandisk Technologies LLC

United States of America

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IPC Class
H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels 149
G11C 16/34 - Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention 141
G11C 16/04 - Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS 125
H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND 120
H01L 27/115 - Electrically programmable read-only memories; Multistep manufacturing processes therefor 102
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1.

THREE-DIMENSIONAL MEMORY DEVICE CONTAINING A PILLAR CONTACT BETWEEN CHANNEL AND SOURCE AND METHODS OF MAKING THE SAME

      
Application Number US2022030438
Publication Number 2023/167697
Status In Force
Filing Date 2022-05-22
Publication Date 2023-09-07
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Okina, Teruo
  • Yada, Shinsuke
  • Yoshimoto, Ryo

Abstract

A semiconductor structure includes a memory die bonded to a logic die. The memory die includes an alternating stack of insulating layers and electrically conductive layers, a semiconductor material layer located on a distal surface of the alternating stack, a dielectric spacer layer located on a distal surface of the semiconductor material layer, memory opening fill structures vertically extending through the alternating stack, through the semiconductor material layer, and at least partly through the dielectric spacer layer, and a source layer located on a distal surface of the dielectric spacer layer and contacting pillar portions of the vertical semiconductor channels that are embedded within the dielectric spacer layer.

IPC Classes  ?

  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout
  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11519 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the top-view layout
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11548 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the boundary region between the core and peripheral circuit regions

2.

NON-VOLATILE MEMORY WITH PLANE INDEPENDENT SCREENING

      
Application Number US2022030423
Publication Number 2023/163730
Status In Force
Filing Date 2022-05-21
Publication Date 2023-08-31
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Murai, Shota
  • Tomiie, Hideto

Abstract

A non-volatile storage apparatus that comprises a plurality of planes of non-volatile memory cells is capable of concurrently programming memory cells in multiple planes. In order to screen for failure of the programming process in a subset of planes, the completion of programming of a fastest plane to a particular data state is used as a trigger to test for program failure of other planes to a different data state. In one embodiment, the test for program failure of other planes to the different data state comprises determining if the memory cells of the other planes that are targeted for programming to the different data state have successfully completed verification of programming for the different data state. The programming process is stopped for those planes that fail the test.

IPC Classes  ?

  • G11C 16/34 - Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
  • G11C 16/14 - Circuits for erasing electrically, e.g. erase voltage switching circuits
  • G11C 29/52 - Protection of memory contents; Detection of errors in memory contents
  • G11C 16/04 - Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS

3.

THREE-DIMENSIONAL MEMORY DEVICE WITH CONTACT VIA STRUCTURES LOCATED OVER SUPPORT PILLAR STRUCTURES AND METHOD OF MAKING THEREOF

      
Application Number US2022030425
Publication Number 2023/163732
Status In Force
Filing Date 2022-05-21
Publication Date 2023-08-31
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor Yin, Xiang

Abstract

An alternating stack of insulating layers and sacrificial material layers is formed over a substrate, and support pillar structures are formed through the alternating stack. Stepped surfaces are formed by patterning the alternating stack and the support pillar structures. A retro-stepped dielectric material portion is formed over the stepped surfaces. Memory openings and memory opening fill structures are formed through the alternating stack. Electrically conductive layers are formed by replacing at least the sacrificial material layers with at least one electrically conductive material. Contact via structures are formed through the retro-stepped dielectric material portion on the electrically conductive layers. A first support pillar structure is located directly below a first contact via structure.

IPC Classes  ?

  • H01L 27/11553 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels
  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels

4.

NON-VOLATILE MEMORY WITH EFFICIENT WORD LINE HOOK-UP

      
Application Number US2022030424
Publication Number 2023/163731
Status In Force
Filing Date 2022-05-21
Publication Date 2023-08-31
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Shao, Shiqian
  • Toyama, Fumiaki

Abstract

A three dimensional non-volatile memory structure includes word lines connected to non-volatile memory cells arranged in blocks. A plurality of word line switches are connected to the word lines and one or more sources of voltage. The word line switches are arranged in groups of X word line switches such that each group of X word line switches is positioned in a line under Y blocks of non-volatile memory cells and has a length that is equal to the width of the Y blocks of non-volatile memory cells, where X>Y.

IPC Classes  ?

  • G11C 8/14 - Word line organisation; Word line lay-out
  • G11C 5/06 - Arrangements for interconnecting storage elements electrically, e.g. by wiring

5.

MEMORY DEVICE INCLUDING MIXED OXIDE CHARGE TRAPPING MATERIALS AND METHODS FOR FORMING THE SAME

      
Application Number US2022030433
Publication Number 2023/163734
Status In Force
Filing Date 2022-05-22
Publication Date 2023-08-31
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Said, Ramy Nashed Bassely
  • Kanakamedala, Senaka
  • Makala, Raghuveer S.
  • Zhang, Peng
  • Zhang, Yanli

Abstract

A memory device includes an alternating stack of insulating layers and electrically conductive layers located over a substrate, a memory opening fill structure including a vertical semiconductor channel and a memory film. The memory film includes a tunneling dielectric layer in contact with the vertical semiconductor channel, a first vertical stack of first dielectric oxide material portions located at levels of the insulating layers and including a dielectric oxide material of a first element, and a second vertical stack of second dielectric oxide material portions located at levels of the electrically conductive layers and including a mixed dielectric oxide material that is a dielectric oxide material of the first element and a second element.

IPC Classes  ?

  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions

6.

THREE-DIMENSIONAL MEMORY DEVICE CONTAINING ETCH-STOP STRUCTURES AND SELF-ALIGNED INSULATING SPACERS AND METHOD OF MAKING THE SAME

      
Application Number US2022030634
Publication Number 2023/163740
Status In Force
Filing Date 2022-05-24
Publication Date 2023-08-31
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Matsuno, Koichi
  • Funayama, Kota
  • Watanabe, Kazuto
  • Furihata, Youko

Abstract

Contact via openings are formed through a retro-stepped dielectric material portion in a three-dimensional memory device to underlying etch stop structures. The etch stop structures may include a stepped conductive or semiconductor etch stop plate overlying stepped surfaces in the staircase region. The contact via openings are extended through the etch stop structures. Alternatively, electrically conductive layers, including a topmost dummy electrically conductive layer in the staircase region, may be employed as etch stop structures. In this case, the contact via openings can be extended through the electrically conductive layers. Insulating spacers are formed at peripheral regions of the extended contact via openings. Contact via structures surrounded by the insulating spacers are formed in the extended contact via openings to a respective underlying electrically conductive layer.

IPC Classes  ?

  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11548 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND

7.

NON-VOLATILE MEMORY WITH EFFICIENT TESTING DURING ERASE

      
Application Number US2022030422
Publication Number 2023/158450
Status In Force
Filing Date 2022-05-21
Publication Date 2023-08-24
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Pachamuthu, Jayavel
  • Lee, Dana

Abstract

When erasing multiple sub-blocks of a block, erase verify is performed for memory cells connected to even word lines to generate even results and for memory cells connected to odd word lines to generate odd results. The even results and the odd results are used to determine that the erase verify process successfully completed. For each NAND string of a first sub-block, a last even result for the NAND string is compared to a last odd result for the NAND string. Despite the determination that the first sub-block successfully completed erase verify, the erasing failed for the first sub-block because the number of NAND strings that have the last even result different than the last odd result is greater than a limit. The system determines that one or more additional sub-blocks also failed erasing based on and in response to determining that the first sub-block failed erasing.

IPC Classes  ?

  • G11C 16/34 - Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
  • G11C 16/08 - Address circuits; Decoders; Word-line control circuits
  • G11C 16/14 - Circuits for erasing electrically, e.g. erase voltage switching circuits
  • G11C 16/04 - Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS

8.

BONDED ASSEMBLY CONTAINING DIFFERENT SIZE OPPOSING BONDING PADS AND METHODS OF FORMING THE SAME

      
Application Number US2022030420
Publication Number 2023/154079
Status In Force
Filing Date 2022-05-21
Publication Date 2023-08-17
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Hou, Lin
  • Rabkin, Peter
  • Higashitani, Masaaki

Abstract

A bonded assembly of a primary semiconductor die and a complementary semiconductor die includes first pairs of first primary bonding pads and first complementary bonding pads that are larger in area than the first primary bonding pads, and second pairs of second primary bonding pads and second complementary bonding pads that are smaller in area than the second primary bonding pads.

IPC Classes  ?

  • H01L 23/00 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details of semiconductor or other solid state devices
  • H01L 23/528 - Layout of the interconnection structure
  • H01L 23/532 - Arrangements for conducting electric current within the device in operation from one component to another including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body characterised by the materials
  • H01L 23/522 - Arrangements for conducting electric current within the device in operation from one component to another including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body

9.

THREE-DIMENSIONAL MEMORY DEVICE WITH SELF-ALIGNED ETCH STOP RINGS FOR A SOURCE CONTACT LAYER AND METHOD OF MAKING THE SAME

      
Application Number US2022030057
Publication Number 2023/146568
Status In Force
Filing Date 2022-05-19
Publication Date 2023-08-03
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Funayama, Kota
  • Shimizu, Satoshi
  • Matsuno, Koichi

Abstract

A memory device includes a lower source-level semiconductor layer, a source contact layer, an upper source-level semiconductor layer, and an alternating stack of insulating layers and electrically conductive layers, and a memory opening fill structure vertically extending through the alternating stack and down to an upper portion of the lower source-level semiconductor layer. The memory opening fill structure includes a vertical semiconductor channel, a memory film laterally surrounding the vertical semiconductor channel, and an annular semiconductor cap contacting a bottom surface of the memory film and contacting a top surface segment of the source contact layer. The annular semiconductor cap may be employed as an etch stop structure during a manufacturing process.

IPC Classes  ?

  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11548 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND

10.

NON-VOLATILE MEMORY WITH ZONE BASED PROGRAM SPEED ADJUSTMENT

      
Application Number US2022030409
Publication Number 2023/146572
Status In Force
Filing Date 2022-05-21
Publication Date 2023-08-03
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Song, Yi
  • Yuan, Jiahui
  • Wang, Yanjie

Abstract

In order to decrease the width of threshold voltage distributions of programmed memory cells without unreasonably increasing the time needed to complete programming, a non-volatile memory uses a zone based program speed adjustment. The non-volatile memory starts programming a first set of the non-volatile memory cells until a minimum number of memory cells of the first set of non-volatile memory cells reach a first threshold voltage. In response to the minimum number of memory cells reaching the first threshold voltage, the first set of non-volatile memory cells are categorized into zones/groups based on threshold voltage. The speed of programming is then adjusted differently for each zone/group and programming is completed for the first set of non-volatile memory cells.

IPC Classes  ?

  • G06F 3/06 - Digital input from, or digital output to, record carriers

11.

THREE-DIMENSIONAL MEMORY DEVICE INCLUDING HAMMERHEAD-SHAPED WORD LINES AND METHODS OF MANUFACTURING THE SAME

      
Application Number US2022030506
Publication Number 2023/146574
Status In Force
Filing Date 2022-05-23
Publication Date 2023-08-03
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Rajashekhar, Adarsh
  • Makala, Raghuveer S.
  • Matsuno, Koichi
  • Kubo, Tomohiro
  • Kasai, Yuki

Abstract

A semiconductor structure includes an alternating stack of insulating layers and electrically conductive layers, a memory opening vertically extending through the alternating stack, and a memory opening fill structure located in the memory opening and including a vertical semiconductor channel, a memory film in contact with the vertical semiconductor channel, and a vertical stack of tubular dielectric spacers laterally surrounding the memory film. The tubular dielectric spacers may include tubular graded silicon oxynitride portions having a composition gradient such that an atomic concentration of nitrogen decreases with a lateral distance from an outer sidewall of the memory film, or may include tubular composite dielectric spacers including a respective tubular silicon oxide spacer and a respective tubular dielectric metal oxide spacer. Each of the electrically conductive layers has a hammerhead-shaped vertical cross-sectional profile.

IPC Classes  ?

  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11519 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the top-view layout
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout

12.

THREE-DIMENSIONAL MEMORY DEVICE CONTAINING SELF-ALIGNED ISOLATION STRIPS AND METHODS FOR FORMING THE SAME

      
Application Number US2022029818
Publication Number 2023/140877
Status In Force
Filing Date 2022-05-18
Publication Date 2023-07-27
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Iwai, Takaaki
  • Inomata, Takashi
  • Maekura, Takayuki

Abstract

A semiconductor structure includes an alternating stack of insulating layers and composite layers. Each of the composite layers includes a plurality of electrically conductive word line strips laterally extending along a first horizontal direction and a plurality of dielectric isolation strips laterally extending along the first horizontal direction and interlaced with the plurality of electrically conductive word line strips. Rows of memory openings are arranged along the first horizontal direction. Each row of memory openings vertically extends through each insulating layer within the alternating stack and one electrically conductive strip for each of the composite layers. Rows of memory opening fill structures are located within the rows of memory openings. Each of the memory opening fill structures includes a respective vertical stack of memory elements and a respective vertical semiconductor channel.

IPC Classes  ?

  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout
  • H01L 27/11573 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the peripheral circuit region

13.

FERROELECTRIC DEVICES INCLUDING A SINGLE CRYSTALLINE FERROELECTRIC LAYER AND METHOD OF MAKING THE SAME

      
Application Number US2022029879
Publication Number 2023/140878
Status In Force
Filing Date 2022-05-18
Publication Date 2023-07-27
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Rajashekhar, Adarsh
  • Makala, Raghuveer S.
  • Sondhi, Kartik

Abstract

A semiconductor structure includes an active region including a source region, a drain region, and a channel region extending between the source region and the drain region, a gate stack, and a gate dielectric layer located between the gate stack and the active region. The gate stack includes an electrically conductive gate electrode and a single crystalline Ill-nitride ferroelectric plate located between the electrically conductive gate electrode and the gate dielectric layer, and an entirety of the single crystalline IIl-nitride ferroelectric plate is single crystalline.

IPC Classes  ?

  • H01L 27/1159 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with the gate electrodes comprising a layer used for its ferroelectric memory properties, e.g. metal-ferroelectric-semiconductor [MFS] or metal-ferroelectric-metal-insulator-semiconductor [MFMIS] characterised by the memory core region
  • H01L 27/11597 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with the gate electrodes comprising a layer used for its ferroelectric memory properties, e.g. metal-ferroelectric-semiconductor [MFS] or metal-ferroelectric-metal-insulator-semiconductor [MFMIS] characterised by three-dimensional arrangements, e.g. cells on different height levels
  • H01L 27/11595 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with the gate electrodes comprising a layer used for its ferroelectric memory properties, e.g. metal-ferroelectric-semiconductor [MFS] or metal-ferroelectric-metal-insulator-semiconductor [MFMIS] characterised by the boundary region between core and peripheral circuit regions
  • H01L 27/11592 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with the gate electrodes comprising a layer used for its ferroelectric memory properties, e.g. metal-ferroelectric-semiconductor [MFS] or metal-ferroelectric-metal-insulator-semiconductor [MFMIS] characterised by the peripheral circuit region
  • H01L 29/51 - Insulating materials associated therewith

14.

THREE-DIMENSIONAL MEMORY DEVICE INCLUDING DIELECTRIC RAILS FOR WARPAGE REDUCTION AND METHOD OF MAKING THE SAME

      
Application Number US2022029742
Publication Number 2023/136852
Status In Force
Filing Date 2022-05-18
Publication Date 2023-07-20
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Sakiyama, Shin
  • Mizuno, Genta
  • Iizuka, Kenzo
  • Yokoyama, Takayuki
  • Sega, Toshiyuki

Abstract

A memory die includes dielectric isolation rails embedded within a substrate semiconductor layer, laterally spaced apart along a first horizontal direction, and each laterally extending along a second horizontal direction that is perpendicular to the first horizontal direction, and alternating stacks of insulating layers and electrically conductive layers located over the substrate semiconductor layer. The alternating stacks are laterally spaced apart along the second horizontal direction by line trenches that laterally extend along the first horizontal direction. Arrays of memory stack structures are provided such that each array of memory stack structures among the arrays of memory stack structures vertically extends through a respective alternating stack. Each of the memory stack structures includes a respective vertical stack of memory elements and a respective vertical semiconductor channel.

IPC Classes  ?

  • H01L 23/00 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details of semiconductor or other solid state devices
  • H01L 27/115 - Electrically programmable read-only memories; Multistep manufacturing processes therefor
  • H01L 21/02 - Manufacture or treatment of semiconductor devices or of parts thereof
  • H01L 23/31 - Encapsulation, e.g. encapsulating layers, coatings characterised by the arrangement

15.

METHODS AND APPARATUSES FOR FORMING SEMICONDUCTOR DEVICES CONTAINING TUNGSTEN LAYERS USING A TUNGSTEN GROWTH SUPPRESSANT

      
Application Number US2022029861
Publication Number 2023/136854
Status In Force
Filing Date 2022-05-18
Publication Date 2023-07-20
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Zhou, Fei
  • Sharangpani, Rahul
  • Makala, Raghuveer S.
  • Terasawa, Yujin
  • Takeguchi, Naoki
  • Yamaguchi, Kensuke
  • Higashitani, Masaaki

Abstract

A method of depositing a metal includes providing a structure a process chamber, and providing a metal fluoride gas and a growth-suppressant gas into the process chamber to deposit the metal over the structure. The metal may comprise a word line or another conductor of a three-dimensional memory device.

IPC Classes  ?

  • H01L 21/285 - Deposition of conductive or insulating materials for electrodes from a gas or vapour, e.g. condensation
  • H01L 21/768 - Applying interconnections to be used for carrying current between separate components within a device
  • C23C 16/14 - Deposition of only one other metal element
  • C23C 16/455 - Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition (CVD) processes characterised by the method of coating characterised by the method used for introducing gases into the reaction chamber or for modifying gas flows in the reaction chamber
  • C23C 16/02 - Pretreatment of the material to be coated
  • C23C 16/04 - Coating on selected surface areas, e.g. using masks
  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels

16.

THREE-DIMENSIONAL MEMORY DEVICE INCLUDING SENSE AMPLIFIERS HAVING A COMMON WIDTH AND SEPARATION

      
Application Number US2022029528
Publication Number 2023/129202
Status In Force
Filing Date 2022-05-17
Publication Date 2023-07-06
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Takimoto, Takuma
  • Hiroi, Masayuki
  • Ogawa, Hiroyuki
  • Okumura, Masatoshi

Abstract

A semiconductor structure includes a memory array including first and second bit lines and a sense amplifier circuit. The sense amplifier circuit includes a first sense amplifier array containing first active sense amplifier transistors that each have an active region having a first width, where the first active sense amplifier transistors are electrically connected to the first bit lines, and a second sense amplifier array including second active sense amplifier transistors that each have the active region having the first width, where the second active sense amplifier transistors are electrically connected to the second bit lines, and dummy active regions which are electrically inactive located between columns of the second active sense amplifier transistors.

IPC Classes  ?

  • H01L 27/11526 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the peripheral circuit region
  • H01L 27/11573 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the peripheral circuit region
  • H01L 27/11548 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels

17.

FIELD EFFECT TRANSISTORS HAVING CONCAVE DRAIN EXTENSION REGION AND METHOD OF MAKING THE SAME

      
Application Number US2022029529
Publication Number 2023/129203
Status In Force
Filing Date 2022-05-17
Publication Date 2023-07-06
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor Ishida, Masashi

Abstract

A field effect transistor includes a source region embedded in a semiconductor material layer, a drain region embedded in the semiconductor material layer and laterally spaced from the source region by a channel, a gate stack including a gate dielectric and a gate electrode, a shallow trench isolation portion embedded in an upper portion of the semiconductor material layer and contacting the drain region and the gate stack, and a concave drain extension region continuously extending underneath the shallow trench isolation portion from a bottom surface of the gate dielectric to a bottom surface of the drain region.

IPC Classes  ?

  • H01L 27/11526 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the peripheral circuit region
  • H01L 27/11573 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the peripheral circuit region
  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/092 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate complementary MIS field-effect transistors

18.

NON-VOLATILE MEMORY WITH EFFICIENT SIGNAL ROUTING

      
Application Number US2022029510
Publication Number 2023/121705
Status In Force
Filing Date 2022-05-17
Publication Date 2023-06-29
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Shao, Shiqian
  • Toyama, Fumiaki
  • Pham, Tuan

Abstract

An integrated memory assembly comprises a control die bonded to a memory die. The memory die includes multiple non-volatile memory structures (e.g., planes, arrays, groups of blocks, etc.), each comprising a stack of alternating conductive and dielectric layers forming staircases at one or more edges of the non-volatile memory structures. The non-volatile memory structures are positioned with gaps between the non-volatile memory structures such that the gaps separate the staircases of adjacent non-volatile memory structures. Metal interlayer segments positioned in the gaps are connected to a top metal layer positioned above non-volatile memory structures and to one or more electrical circuits on the control die via zero, one or more other metal layers/segments.

IPC Classes  ?

  • H01L 25/065 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , or in a single subclass of , , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group
  • H01L 27/11573 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the peripheral circuit region
  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 25/18 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices the devices being of types provided for in two or more different subgroups of the same main group of groups , or in a single subclass of ,
  • H01L 25/00 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices

19.

NON-VOLATILE MEMORY WITH DIFFERENTIAL TEMPERATURE COMPENSATION FOR SUPER PAGE PROGRAMMING

      
Application Number US2022030478
Publication Number 2023/113858
Status In Force
Filing Date 2022-05-23
Publication Date 2023-06-22
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Song, Yi
  • Zhao, Dengtao
  • Puthenthermadam, Sarath
  • Yuan, Jiahui

Abstract

A system has been described that performs differential temperature compensation based on a differential between the temperature at time of programming and temperature at time of reading for a set of data. Differential temperature compensation is useful for bulk programming/reading (e.g., many pages of data) and/or programming/reading super pages of data (multiple pages residing on different memory die).

IPC Classes  ?

  • G11C 7/04 - Arrangements for writing information into, or reading information out from, a digital store with means for avoiding disturbances due to temperature effects
  • G11C 16/10 - Programming or data input circuits
  • G11C 16/26 - Sensing or reading circuits; Data output circuits
  • G11C 16/24 - Bit-line control circuits

20.

NON-VOLATILE MEMORY WITH DIFFERENTIAL TEMPERATURE COMPENSATION FOR BULK PROGRAMMING

      
Application Number US2022030479
Publication Number 2023/113859
Status In Force
Filing Date 2022-05-23
Publication Date 2023-06-22
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Song, Yi
  • Zhao, Dengtao
  • Puthenthermadam, Sarath
  • Yuan, Jiahui

Abstract

A system has been described that performs differential temperature compensation based on a differential between the temperature at time of programming and temperature at time of reading for a set of data. Differential temperature compensation is useful for bulk programming/reading (e.g., many pages of data) and/or programming/reading super pages of data (multiple pages residing on different memory die).

IPC Classes  ?

  • G11C 7/04 - Arrangements for writing information into, or reading information out from, a digital store with means for avoiding disturbances due to temperature effects
  • G11C 16/10 - Programming or data input circuits
  • G11C 16/26 - Sensing or reading circuits; Data output circuits
  • G11C 16/24 - Bit-line control circuits

21.

NON-VOLATILE MEMORY WITH DATA REFRESH

      
Application Number US2022029507
Publication Number 2023/113855
Status In Force
Filing Date 2022-05-17
Publication Date 2023-06-22
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Song, Yi
  • Yuan, Jiahui
  • Wan, Jun
  • Dutta, Deepanshu

Abstract

A memory system identifies memory cells connected to a common word line that have had their threshold voltage unintentionally drift lower than programmed by determining whether memory cells meet two criteria: (1) the memory cells have threshold voltages within an offset of a read compare voltage of a data state; and (2) adjacent memory cells (connected to word lines that are adjacent to the common word line) are in one or more low data states. For those memory cells meeting the two criteria, the memory system performs some amount of programming on the memory cells to refresh the data stored in those memory cells to be as originally intended.

IPC Classes  ?

  • G11C 16/10 - Programming or data input circuits
  • G11C 16/26 - Sensing or reading circuits; Data output circuits
  • G11C 16/30 - Power supply circuits
  • G11C 16/08 - Address circuits; Decoders; Word-line control circuits
  • G11C 16/04 - Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS
  • G06F 3/06 - Digital input from, or digital output to, record carriers

22.

THREE DIMENSIONAL MEMORY DEVICE CONTAINING RESONANT TUNNELING BARRIER AND HIGH MOBILITY CHANNEL AND METHOD OF MAKING THEREOF

      
Application Number US2022029493
Publication Number 2023/096665
Status In Force
Filing Date 2022-05-16
Publication Date 2023-06-01
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Rabkin, Peter
  • Higashitani, Masaaki

Abstract

A three-dimensional memory device containing a plurality of levels of memory elements includes a memory film containing a layer stack that includes a resonant tunneling barrier stack, a semiconductor barrier layer, and a memory material layer located between the resonant tunneling barrier stack and the semiconductor barrier layer, a semiconductor channel, and a control gate electrode.

IPC Classes  ?

  • H10B 43/27 - EEPROM devices comprising charge-trapping gate insulators characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H10B 43/35 - EEPROM devices comprising charge-trapping gate insulators characterised by the memory core region with cell select transistors, e.g. NAND
  • H10B 43/50 - EEPROM devices comprising charge-trapping gate insulators characterised by the boundary region between the core and peripheral circuit regions
  • H01L 29/15 - Structures with periodic or quasi periodic potential variation, e.g. multiple quantum wells, superlattices

23.

NON-VOLATILE MEMORY WITH STAGGERED RAMP DOWN AT THE END OF PRE-CHARGING

      
Application Number US2022029343
Publication Number 2023/091184
Status In Force
Filing Date 2022-05-14
Publication Date 2023-05-25
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Yang, Xiang
  • Wu, Fanqi
  • Guo, Jiacen
  • Yuan, Jiahui

Abstract

In order to inhibit memory cells from programming and mitigate program disturb, the memory pre-charges channels of NAND strings connected to a common set of control lines by applying positive voltages to the control lines and applying voltages to a source line and bit lines connected to the NAND strings. The control lines include word lines and select lines. The word lines include an edge word line. The memory ramps down the positive voltages applied to the control lines, including ramping down control lines on a first side of the edge word line, ramping down the edge word line, and performing a staggered ramp down of three or more control lines on a second side of the edge word line. After the pre-charging, unselected NAND strings have their channel boosted to prevent programming and selected NAND strings experience programming on selected memory cells.

IPC Classes  ?

  • G11C 16/08 - Address circuits; Decoders; Word-line control circuits
  • G11C 16/24 - Bit-line control circuits
  • G11C 16/30 - Power supply circuits
  • G11C 8/14 - Word line organisation; Word line lay-out
  • G11C 16/04 - Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS

24.

THREE-DIMENSIONAL MEMORY DEVICE AND METHOD OF MAKING THE SAME USING DIFFERENTIAL THINNING OF VERTICAL CHANNELS

      
Application Number US2022029385
Publication Number 2023/091189
Status In Force
Filing Date 2022-05-16
Publication Date 2023-05-25
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Yamashita, Kosaku
  • Yonemochi, Yasuaki

Abstract

An alternating stack of insulating layers and spacer material layers is formed over a substrate. An insulating cap layer is formed thereupon. A memory opening is formed, which has a greater lateral dimension at a level of an upper insulating cap sublayer than at a level of a lower insulating cap sublayer. A memory film and a semiconductor channel material layer is formed in the memory opening. Ions of at least one dopant species is implanted into a top portion of the semiconductor channel material layer. An isotropic etch process etches an unimplanted portion of the semiconductor channel material layer at a higher etch rate than the implanted top portion of the semiconductor channel material layer to form a vertical semiconductor channel.

IPC Classes  ?

  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions

25.

SOFT ERASE PROCESS DURING PROGRAMMING OF NON-VOLATILE MEMORY

      
Application Number US2022029346
Publication Number 2023/091186
Status In Force
Filing Date 2022-05-14
Publication Date 2023-05-25
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Yuan, Jiahui
  • Dutta, Deepanshu

Abstract

Programming a plurality of non-volatile memory cells includes performing a soft erase process during the programming. The soft erase process includes pre-charging channels of the memory cells and performing an erase operation subsequent to the pre-charging while the channels are at one or more elevated voltages at least partially due to the pre-charging.

IPC Classes  ?

  • G06F 3/06 - Digital input from, or digital output to, record carriers

26.

WAFER SURFACE CHEMICAL DISTRIBUTION SENSING SYSTEM AND METHODS FOR OPERATING THE SAME

      
Application Number US2022029380
Publication Number 2023/091188
Status In Force
Filing Date 2022-05-16
Publication Date 2023-05-25
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor Yatsuzuka, Shota

Abstract

A CMP system includes a polishing apparatus configured to polish a wafer and roll cleaning apparatus, which includes a rotating roll brush configured to roll against a surface of the wafer during operation, a fluid supply system configured to apply a fluid on the surface of the wafer, and an array of liquid sensors configured to detect a distribution of the fluid on the surface of the wafer in areas that are not covered by the rotating roll brush.

IPC Classes  ?

  • B24B 37/04 - Lapping machines or devices; Accessories designed for working plane surfaces
  • B24B 57/02 - Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
  • B24B 29/00 - Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
  • B24B 49/02 - Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent
  • H01L 21/67 - Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components

27.

THREE-DIMENSIONAL MEMORY DEVICE WITH WORD-LINE ETCH STOP LINERS AND METHOD OF MAKING THEREOF

      
Application Number US2022029342
Publication Number 2023/086126
Status In Force
Filing Date 2022-05-14
Publication Date 2023-05-19
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Rajashekhar, Adarsh
  • Makala, Raghuveer S.
  • Zhou, Fei

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers located over a substrate, memory stack structures vertically extending through the alternating stack, etch stop plates located in the staircase region, laterally and vertically spaced apart among one another, and overlying an end portion of a respective one of the electrically conductive layers, and contact via structures located in a staircase region, vertically extending through a respective one of the etch stop plates, and contacting a respective one of the electrically conductive layers.

IPC Classes  ?

  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11548 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11519 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the top-view layout
  • H01L 27/11526 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the peripheral circuit region

28.

HIGH ASPECT RATIO VIA FILL PROCESS EMPLOYING SELECTIVE METAL DEPOSITION AND STRUCTURES FORMED BY THE SAME

      
Application Number US2022029316
Publication Number 2023/075856
Status In Force
Filing Date 2022-05-13
Publication Date 2023-05-04
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Sharangpani, Rahul
  • Makala, Raghuveer S.
  • Amano, Fumitaka
  • Ishikawa, Kensuke

Abstract

A semiconductor structure includes a first dielectric material layer, a first metal interconnect structure embedded within the first dielectric material layer and including a first metallic material portion including a first metal, a second dielectric material layer located over the first dielectric material layer, and a second metal interconnect structure embedded within the second dielectric material layer and including an integrated line-and-via structure that includes a second metallic material portion including a second metal. A metal-semiconductor alloy portion including a first metal-semiconductor alloy of the first metal and a semiconductor material is located underneath the second metallic material portion, and contacts a top surface of the first metal interconnect structure.

IPC Classes  ?

  • H10B 43/50 - EEPROM devices comprising charge-trapping gate insulators characterised by the boundary region between the core and peripheral circuit regions
  • H10B 41/50 - Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by the boundary region between the core region and the peripheral circuit region
  • H10B 43/27 - EEPROM devices comprising charge-trapping gate insulators characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H10B 41/27 - Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 21/768 - Applying interconnections to be used for carrying current between separate components within a device

29.

THREE-DIMENSIONAL MEMORY DEVICE WITH ORTHOGONAL MEMORY OPENING AND SUPPORT OPENING ARRAYS AND METHOD OF MAKING THEREOF

      
Application Number US2022029336
Publication Number 2023/075857
Status In Force
Filing Date 2022-05-14
Publication Date 2023-05-04
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Tobioka, Akihiro
  • Tanaka, Yusuke

Abstract

An alternating stack of insulating layers and spacer material layers is formed over a substrate. The spacer material layers are formed as, or are subsequently replaced with, electrically conductive layers. Memory openings and support openings are formed through the alternating stack. The memory openings are arranged in a first hexagonal array having a nearest-neighbor direction that is parallel to a first horizontal direction, and the support openings are arranged in a second hexagonal array having a nearest-neighbor direction that is perpendicular to the first horizontal direction. Memory opening fill structures are formed within a respective one of the memory openings, and support pillar structures within a respective one of the support openings.

IPC Classes  ?

  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout
  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions

30.

NON-VOLATILE MEMORY WITH ADJUSTED BIT LINE VOLTAGE DURING VERIFY

      
Application Number US2022028463
Publication Number 2023/069147
Status In Force
Filing Date 2022-05-10
Publication Date 2023-04-27
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Lien, Yu-Chung
  • Yuan, Jiahui
  • Kwon, Ohwon

Abstract

A control circuit connected to non-volatile memory cells applies a programming signal to a plurality of the non-volatile memory cells in order to program the plurality of the non-volatile memory cells to a set of data states. The control circuit performs program verification for the non-volatile memory cells, including applying bit line voltages during program verification based on word line position and data state being verified.

IPC Classes  ?

  • G11C 16/34 - Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
  • G11C 16/24 - Bit-line control circuits
  • G11C 16/08 - Address circuits; Decoders; Word-line control circuits
  • G11C 16/04 - Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS
  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions

31.

THREE-DIMENSIONAL MEMORY DEVICE WITH DISCRETE CHARGE STORAGE ELEMENTS AND METHODS FOR FORMING THE SAME

      
Application Number US2022028469
Publication Number 2023/069149
Status In Force
Filing Date 2022-05-10
Publication Date 2023-04-27
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Tsutsumi, Masanori
  • Mukae, Yusuke
  • Hinoue, Tatsuya
  • Kasai, Yuki

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers, and memory stack structures extending through the alternating stack. Each of the memory stack structures includes a vertical semiconductor channel, a tunneling dielectric layer, a vertical stack of discrete silicon nitride memory elements located at levels of the electrically conductive layers, and a vertical stack of discrete silicon oxide blocking dielectric structures laterally surrounding the vertical stack of discrete silicon nitride memory elements. Each of the silicon oxide blocking dielectric structures includes a silicon oxynitride surface region, and an atomic concentration of nitrogen atoms within the silicon oxynitride surface region decreases with a lateral distance from an interface between the silicon oxynitride surface region and a respective one of the silicon nitride memory elements.

IPC Classes  ?

  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11519 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the top-view layout
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout

32.

FIELD EFFECT TRANSISTORS WITH REDUCED GATE FRINGE AREA AND METHOD OF MAKING THE SAME

      
Application Number US2022029016
Publication Number 2023/059375
Status In Force
Filing Date 2022-05-12
Publication Date 2023-04-13
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Fujita, Takahito
  • Shishido, Kiyokazu
  • Ogawa, Hiroyuki

Abstract

A semiconductor structure includes at least two field effect transistors. A gate strip including a plurality of gate dielectrics and a gate electrode strip can be formed over a plurality of semiconductor active regions. Deep source/drain regions are formed by implanting dopants into semiconductor active regions without implanting the dopants into inter-electrode regions of a shallow trench isolation structure. The gate strip is divided into gate stacks prior to or after formation of the deep source/drain regions.

IPC Classes  ?

  • H01L 27/088 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate
  • H01L 29/423 - Electrodes characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
  • H01L 29/49 - Metal-insulator semiconductor electrodes
  • H01L 29/66 - Types of semiconductor device
  • H01L 29/78 - Field-effect transistors with field effect produced by an insulated gate

33.

THREE DIMENSIONAL MEMORY DEVICE CONTAINING DUMMY WORD LINES AND P-N JUNCTION AT JOINT REGION AND METHOD OF MAKING THE SAME

      
Application Number US2022030029
Publication Number 2023/048778
Status In Force
Filing Date 2022-05-19
Publication Date 2023-03-30
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Zhang, Yanli
  • Zhang, Peng

Abstract

A three-dimensional memory device includes a first alternating stack of first insulating layers and first electrically conductive layers located over a semiconductor material layer, an inter-tier dielectric layer, and a second alternating stack of second insulating layers and second electrically conductive layers located over the inter-tier dielectric layer. A memory opening vertically extends through the second alternating stack, the inter-tier dielectric layer, and the first alternating stack. A memory opening fill structure is located in the memory opening, and includes a first vertical semiconductor channel, a second vertical semiconductor channel, and an inter-tier doped region located between the first and the second semiconductor channel, and providing a first p-n junction with the first vertical semiconductor channel and providing a second p-n junction with the second vertical semiconductor channel.

IPC Classes  ?

  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11568 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions

34.

SEMICONDUCTOR DEVICE CONTAINING BIT LINES SEPARATED BY AIR GAPS AND METHODS FOR FORMING THE SAME

      
Application Number US2022029073
Publication Number 2023/043505
Status In Force
Filing Date 2022-05-12
Publication Date 2023-03-23
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Rajashekhar, Adarsh
  • Makala, Raghuveer S.
  • Sharangpani, Rahul
  • Zhou, Fei

Abstract

A semiconductor structure includes semiconductor devices located over a substrate, bit lines electrically connected to the semiconductor devices and having a respective reentrant vertical cross-sectional profile within a vertical plane that is perpendicular to a lengthwise direction along which the bit lines laterally extend, and dielectric portions that are interlaced with the bit lines along a horizontal direction that is perpendicular to the lengthwise direction. The dielectric portions may contain air gaps. A bit-line-contact via structure can be formed on top of a bit line. In some embodiments, dielectric cap strips may be located on top surface of the dielectric portions and may cover peripheral regions of the top surfaces of the bit lines without covering middle regions of the top surfaces of the bit lines.

IPC Classes  ?

  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11573 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the peripheral circuit region

35.

FIELD EFFECT TRANSISTORS WITH GATE FINS AND METHOD OF MAKING THE SAME

      
Application Number US2022028601
Publication Number 2023/043504
Status In Force
Filing Date 2022-05-10
Publication Date 2023-03-23
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Pulugurtha, Srinivas
  • Zhang, Yanli
  • Alsmeier, Johann
  • Togo, Mitsuhiro
  • Kobayashi, Takashi
  • Narayanan, Sudarshan

Abstract

A semiconductor structure includes a semiconductor substrate containing a shallow trench isolation structure that laterally surrounds a transistor active region, at least one line trench vertically extending into the semiconductor substrate, and a source region and a drain region located in the transistor active region. A contoured channel region continuously extends from the source region to the drain region underneath the at least one line trench. A gate dielectric contacts all surfaces of the at least one line trench and extends over an entirety of the contoured channel region. A gate electrode containing at least one fin portion overlies the gate dielectric

IPC Classes  ?

  • H01L 27/108 - Dynamic random access memory structures
  • H01L 27/105 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including a plurality of individual components in a repetitive configuration including field-effect components

36.

THREE-DIMENSIONAL MEMORY DEVICE WITH REPLACEMENT SELECT GATE ELECTRODES AND METHODS OF MANUFACTURING THE SAME

      
Application Number US2022028223
Publication Number 2023/033880
Status In Force
Filing Date 2022-05-07
Publication Date 2023-03-09
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor Hinoue, Tatsuya

Abstract

An alternating stack of insulating layers and sacrificial material layers is formed over a substrate. The sacrificial material layers include a stack of word-line-level sacrificial material layers and at least one drain-select-level sacrificial material layer. Drain-select-level openings are formed through the at least one drain-select-level sacrificial material layer, which is replaced with at least one drain-select-level electrically conductive layer. Memory openings are formed by vertically extending the drain-select-level openings through the word-line-level sacrificial material layers. Memory opening fill structures are formed within the memory openings. The word-line-level sacrificial material layers are replaced with word-line-level electrically conductive layers.

IPC Classes  ?

  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11597 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with the gate electrodes comprising a layer used for its ferroelectric memory properties, e.g. metal-ferroelectric-semiconductor [MFS] or metal-ferroelectric-metal-insulator-semiconductor [MFMIS] characterised by three-dimensional arrangements, e.g. cells on different height levels
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout
  • H01L 27/11519 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the top-view layout
  • H01L 27/11587 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with the gate electrodes comprising a layer used for its ferroelectric memory properties, e.g. metal-ferroelectric-semiconductor [MFS] or metal-ferroelectric-metal-insulator-semiconductor [MFMIS] characterised by the top-view layout
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11548 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the boundary region between the core and peripheral circuit regions

37.

NON-VOLATILE MEMORY WITH PROGRAM SKIP FOR EDGE WORD LINE

      
Application Number US2022028237
Publication Number 2023/033883
Status In Force
Filing Date 2022-05-08
Publication Date 2023-03-09
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Yang, Xiang
  • Dutta, Deepanshu

Abstract

In a non-volatile memory, a block of NAND strings is divided into sub-blocks by etching the select gate layers between sub-blocks. This results in a subset of NAND strings (e.g., at the border of the sub-blocks) having select gates that are partially etched such that the partially etched select gates are partially shaped as compared to the select gates of NAND strings that have not been etched. Host data is programmed to non-volatile memory cells that are connected to an edge word line and are on NAND strings having a complete shaped select gate. Host data is also programmed to non-volatile memory cells that are connected to non-edge word lines. However, host data is not programmed to non-volatile memory cells that are connected to the edge word line and are on NAND strings having a partial shaped select gate.

IPC Classes  ?

  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • G11C 16/10 - Programming or data input circuits
  • G11C 16/04 - Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS
  • G11C 16/08 - Address circuits; Decoders; Word-line control circuits
  • G11C 16/24 - Bit-line control circuits

38.

IMPLEMENTATION OF DEEP NEURAL NETWORKS FOR TESTING AND QUALITY CONTROL IN THE PRODUCTION OF MEMORY DEVICES

      
Application Number US2022030628
Publication Number 2023/033884
Status In Force
Filing Date 2022-05-24
Publication Date 2023-03-09
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Zhou, Fei
  • Chu, Cheng-Chung
  • Makala, Raghuveer

Abstract

Techniques are presented for the application of neural networks to the fabrication of integrated circuits and electronic devices, where example are given for the fabrication of non-volatile memory circuits and the mounting of circuit components on the printed circuit board of a solid state drive (SSD). The techniques include the generation of high precision masks suitable for analyzing electron microscope images of feature of integrated circuits and of handling the training of the neural network when the available training data set is sparse through use of a generative adversary network (GAN).

IPC Classes  ?

  • G05B 19/418 - Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control (DNC), flexible manufacturing systems (FMS), integrated manufacturing systems (IMS), computer integrated manufacturing (CIM)
  • G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
  • H01L 21/66 - Testing or measuring during manufacture or treatment

39.

DETECTING BIT LINE OPEN CIRCUITS AND SHORT CIRCUITS IN MEMORY DEVICE WITH MEMORY DIE BONDED TO CONTROL DIE

      
Application Number US2022028221
Publication Number 2023/033879
Status In Force
Filing Date 2022-05-07
Publication Date 2023-03-09
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor Murphy, Brian

Abstract

Apparatuses and techniques are presented for detecting bit line open circuits and short circuits in a memory device in which a memory die is inverted and bonded to a control die. In one approach, the control die comprises a set of bit lines which are connected to a set of bit lines of the memory die, and the set of bit lines of the control die comprise ground transistors, e.g., transistors connected to a ground node. Ground transistors of even-numbered bit lines may be commonly controlled, while ground transistors of odd-numbered bit lines are commonly controlled. The ground transistors may be controlled to detect open circuits and short circuits in the bit lines of the control die and the memory die. A laser scanning technique can also be used to determine a physical location of a defect of a bit line.

IPC Classes  ?

  • G11C 16/24 - Bit-line control circuits
  • G11C 16/26 - Sensing or reading circuits; Data output circuits
  • G11C 16/04 - Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS
  • G11C 29/02 - Detection or location of defective auxiliary circuits, e.g. defective refresh counters
  • H01L 27/11529 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the peripheral circuit region of memory regions comprising cell select transistors, e.g. NAND
  • G11C 29/12 - Built-in arrangements for testing, e.g. built-in self testing [BIST]

40.

SUB-BLOCK PROGRAMMING MODE WITH MULTI-TIER BLOCK

      
Application Number US2022028236
Publication Number 2023/033882
Status In Force
Filing Date 2022-05-08
Publication Date 2023-03-09
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Lien, Yu-Chung
  • Yuan, Jiahui
  • Eliash, Tomer

Abstract

Apparatuses and techniques are described for programming a multi-tier block in which sub-blocks are arranged in respective tiers. When a program operation involves the source-side sub-block, the NAND strings are pre-charged from the source line. When a program operation involves the drain-side sub-block, the NAND strings are pre-charged from the bit line. When a program operation involves an interior sub-block, the NAND strings can be pre-charged from the bit line if all sub-blocks on the drain side of the interior sub-block are erased, or from the source line if all sub-blocks on the source side of the interior sub-block are erased. A table can be provided which identifies free blocks, free sub-blocks and a corresponding program order. If such a table is not available, the sub-blocks can be read to determine whether they are programmed.

IPC Classes  ?

  • G11C 16/16 - Circuits for erasing electrically, e.g. erase voltage switching circuits for erasing blocks, e.g. arrays, words, groups
  • G11C 16/04 - Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS
  • G11C 16/26 - Sensing or reading circuits; Data output circuits
  • G11C 16/08 - Address circuits; Decoders; Word-line control circuits
  • H01L 27/11529 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the peripheral circuit region of memory regions comprising cell select transistors, e.g. NAND

41.

THREE-DIMENSIONAL MEMORY DEVICE WITH STAIRCASE ETCH STOP STRUCTURES AND METHODS FOR FORMING THE SAME

      
Application Number US2022028631
Publication Number 2023/027786
Status In Force
Filing Date 2022-05-10
Publication Date 2023-03-02
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor Shimomura, Kenichi

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers, and memory opening fill structures vertically extending through the alternating stack. An insulating liner overlies stepped surfaces of the alternating stack in a staircase region. A plurality of discrete dielectric plates can be formed over the insulating liner. In one embodiment, the plurality of discrete dielectric plates can function as etch stop structures for formation of contact via structures that contact underlying portions of the electrically conductive layers. In another embodiment, the plurality of discrete dielectric plates may be replaced with a metallic material that forms extensions of the electrically conductive layers, and can be employed as etch stop structures during formation of contact via structures.

IPC Classes  ?

  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11519 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the top-view layout
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions

42.

MODIFYING PROGRAM AND ERASE PARAMETERS FOR SINGLE-BIT MEMORY CELLS TO IMPROVE SINGLE-BIT/MULTI-BIT HYBRID RATIO

      
Application Number US2022027551
Publication Number 2023/022762
Status In Force
Filing Date 2022-05-04
Publication Date 2023-02-23
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Zainuddin, Abu Naser
  • Li, Jia
  • Yuan, Jiahui
  • Lei, Bo

Abstract

Apparatuses and techniques are described for modifying program and erase parameters in a memory device in which memory cells can be operated in a single bit per cell (SLC) mode or a multiple bits per cell mode. In one approach, the stress on a set of memory cells in an SLC mode is reduced during programming and erasing when the number of program-erase cycles for the block in the SLC mode is below a threshold. For example, during programming, the program-verify voltage and program voltages can be reduced to provide a shallower than normal programming. During erasing, the erase-verify voltage can be increased while the erase voltages can be reduced to provide a shallower than normal erase. When the number of program-erase cycles for the block in the SLC mode is above the threshold, the program and erase parameters revert to a default levels.

IPC Classes  ?

  • G11C 11/56 - Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency
  • G11C 16/10 - Programming or data input circuits
  • G11C 16/34 - Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention

43.

CONTROLLING BIT LINE PRE-CHARGE VOLTAGE SEPARATELY FOR MULTI-LEVEL MEMORY CELLS AND SINGLE-LEVEL MEMORY CELLS TO REDUCE PEAK CURRENT CONSUMPTION

      
Application Number US2022027966
Publication Number 2023/022766
Status In Force
Filing Date 2022-05-06
Publication Date 2023-02-23
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Lien, Yu-Chung
  • Dutta, Deepanshu
  • Yuan, Jiahui

Abstract

Apparatuses and techniques are described for controlling a bit line pre-charge voltage in a program operation based on a number of bits per cell, with a goal to reduce peak current consumption. In one aspect, the ramp up of a bit line voltage to an inhibit level is optimized according to the number of bits per cell. The ramp up can involve increasing the bit line voltage from an initial level to a target voltage at a regulated rate, then increasing the bit line voltage from the target voltage to a final voltage at an unregulated rate. In one approach, the regulated ramp rate is less for single-level cell programming compared to multi-level cell programming. The target voltage can also be optimized based on the number of bis per cell.

IPC Classes  ?

  • G11C 16/24 - Bit-line control circuits
  • G11C 16/10 - Programming or data input circuits
  • G11C 16/04 - Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS
  • G11C 16/30 - Power supply circuits
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels

44.

NON-VOLATILE MEMORY WITH EFFICIENT TESTING DURING ERASE

      
Application Number US2022028225
Publication Number 2023/022767
Status In Force
Filing Date 2022-05-07
Publication Date 2023-02-23
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Pachamuthu, Jayavel
  • Subramanian, Ramkumar

Abstract

A non-volatile memory system erasing groups of connected memory cells separately performs erase verify for memory cells connected to even word lines to generate even results and erase verify for memory cells connected to odd word lines to generate odd results. The even results and the odd results are used to determine if the erase verify process indicates that the erasing has successful completed. In addition, for each group of connected memory cells, a last even result for the group is compared to a last odd result for the group. Even if the erase verify indicated that the erasing has successfully completed, the system may determine that the erasing failed (i.e. due to a defect) if the number of groups of connected memory cells that have the last even result different than the last odd result is greater than a limit.

IPC Classes  ?

  • G11C 16/34 - Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
  • G11C 16/14 - Circuits for erasing electrically, e.g. erase voltage switching circuits
  • G11C 16/08 - Address circuits; Decoders; Word-line control circuits
  • G11C 16/24 - Bit-line control circuits
  • G11C 16/04 - Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS

45.

THREE-DIMENSIONAL MEMORY DEVICE WITH DOPED SEMICONDUCTOR BRIDGE STRUCTURES AND METHODS FOR FORMING THE SAME

      
Application Number US2022028391
Publication Number 2023/022769
Status In Force
Filing Date 2022-05-09
Publication Date 2023-02-23
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Itou, Ryousuke
  • Sai, Akihisa
  • Iizuka, Kenzo

Abstract

A vertically alternating sequence of continuous insulating layers and continuous sacrificial material layers is formed over a substrate, and memory opening fill structures including vertical stacks of memory elements are formed through the vertically alternating sequence. Backside trenches are formed to divide the vertically alternating sequence into a plurality of alternating stacks of insulating layers and sacrificial material layers. Bridge structures are formed within each of the backside trenches. The sacrificial material layers are replaced with electrically conductive layers while the bridge structure are present within the backside trenches.

IPC Classes  ?

  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions

46.

THREE-DIMENSIONAL MEMORY DEVICE INCLUDING ALUMINUM ALLOY WORD LINES AND METHOD OF MAKING THE SAME

      
Application Number US2022027545
Publication Number 2023/018452
Status In Force
Filing Date 2022-05-04
Publication Date 2023-02-16
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Chen, Linghan
  • Makala, Raghuveer S.
  • Amano, Fumitaka

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers. The electrically conductive layers include an intermetallic alloy of aluminum and at least one metal other than aluminum. Memory openings vertically extend through the alternating stack. Memory opening fill structures are located in a respective one of the memory openings and include a respective vertical semiconductor channel and a respective vertical stack of memory elements.

IPC Classes  ?

  • H01L 27/11551 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 29/80 - Field-effect transistors with field effect produced by a PN or other rectifying junction gate
  • H01L 29/49 - Metal-insulator semiconductor electrodes
  • H01L 21/02 - Manufacture or treatment of semiconductor devices or of parts thereof

47.

THREE-DIMENSIONAL MEMORY DEVICE WITH SEPARATED CONTACT REGIONS AND METHODS FOR FORMING THE SAME

      
Application Number US2022028266
Publication Number 2023/018456
Status In Force
Filing Date 2022-05-09
Publication Date 2023-02-16
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Ogawa, Hiroyuki
  • Kai, James
  • Mizutani, Yuki
  • Otoi, Hisakazu
  • Higashitani, Masaaki
  • Toyama, Fumiaki
  • Chibvongodze, Hardwell
  • Cui, Zhixin
  • Gautam, Rajdeep

Abstract

A memory die includes an alternating stack of insulating layers and electrically conductive layers through which memory opening fill structures vertically extend. The memory die includes at least three memory array regions interlaced with at least two contact regions, or at least three contact regions interlaced with at least two memory array regions in the same memory plane. A logic die including at least two word line driver regions can be bonded to the memory die. The interlacing of the contact regions and the memory array regions can reduce lateral offset of boundaries of the word line driver regions from boundaries of the contact regions.

IPC Classes  ?

  • H10B 43/27 - EEPROM devices comprising charge-trapping gate insulators characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H10B 43/35 - EEPROM devices comprising charge-trapping gate insulators characterised by the memory core region with cell select transistors, e.g. NAND
  • H10B 43/50 - EEPROM devices comprising charge-trapping gate insulators characterised by the boundary region between the core and peripheral circuit regions
  • H10B 41/27 - Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H10B 41/35 - Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by the memory core region with a cell select transistor, e.g. NAND
  • H10B 41/50 - Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by the boundary region between the core region and the peripheral circuit region

48.

BONDED ASSEMBLY INCLUDING INTER-DIE VIA STRUCTURES AND METHODS FOR MAKING THE SAME

      
Application Number US2022027542
Publication Number 2023/014414
Status In Force
Filing Date 2022-05-04
Publication Date 2023-02-09
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Hou, Lin
  • Rabkin, Peter
  • Chen, Yangyin
  • Higashitani, Masaaki

Abstract

A bonded assembly includes a first semiconductor die and a second semiconductor die that are bonded to each other by dielectric-to-dielectric bonding. First conductive via structures vertically extend through the second semiconductor die and a respective subset of the first dielectric material layers in the first semiconductor die, and contact a respective first metal interconnect structure in the first semiconductor die. Second conductive via structures vertically extend through a second substrate and a respective subset of the second dielectric material layers in the second semiconductor die, and contacting a respective second metal interconnect structure in the second semiconductor die. Redistribution metal interconnect structures located over a backside surface of the second substrate electrically connect the first conductive via structures and the second conductive via structures, and provide electrical interconnection between the first semiconductor die and the second semiconductor die.

IPC Classes  ?

  • H01L 23/48 - Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads or terminal arrangements
  • H01L 25/065 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , or in a single subclass of , , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group
  • H01L 23/485 - Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads or terminal arrangements consisting of lead-in layers inseparably applied to the semiconductor body consisting of layered constructions comprising conductive layers and insulating layers, e.g. planar contacts
  • H01L 25/18 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices the devices being of types provided for in two or more different subgroups of the same main group of groups , or in a single subclass of ,

49.

THREE-DIMENSIONAL MEMORY DEVICE WITH A COLUMNAR MEMORY OPENING ARRANGEMENT AND METHOD OF MAKING THEREOF

      
Application Number US2022027359
Publication Number 2023/009193
Status In Force
Filing Date 2022-05-03
Publication Date 2023-02-02
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor Inoue, Tatsuya

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers located over a substrate, a plurality of periodic two-dimensional arrays of memory openings vertically extending through the alternating stack, a plurality of periodic two-dimensional arrays of memory opening fill structures, and bit lines. The bit lines laterally extend along a second horizontal direction. Each periodic two-dimensional array of memory openings includes a plurality of columns of memory openings in which neighboring columns of memory openings are laterally spaced apart along a first horizontal direction with an intercolumnar pitch. Memory openings within each column of memory openings are laterally spaced apart along the second horizontal direction with a nearest-neighbor pitch.

IPC Classes  ?

  • H01L 23/528 - Layout of the interconnection structure
  • H01L 27/11578 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout
  • H01L 23/535 - Arrangements for conducting electric current within the device in operation from one component to another including internal interconnections, e.g. cross-under constructions

50.

THREE DIMENSIONAL MEMORY DEVICE CONTAINING TRUNCATED CHANNELS AND METHOD OF OPERATING THE SAME WITH DIFFERENT ERASE VOLTAGES FOR DIFFERENT BIT LINES

      
Application Number US2022027243
Publication Number 2023/287474
Status In Force
Filing Date 2022-05-02
Publication Date 2023-01-19
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Lien, Yu-Chung
  • Prakash, Abhijith
  • Payak, Keyur
  • Yuan, Jiahui
  • Tseng, Huai-Yuan
  • Yada, Shinsuke
  • Isozumi, Kazuki

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers, first memory opening fill structures extending through the alternating stack and including a respective first vertical semiconductor channel having a tubular section and a semi-tubular section, second memory opening fill structures, first bit lines electrically connected to a respective subset of the first drain regions, second bit lines electrically connected to a respective subset of the second drain regions, and an erase voltage application circuit configured to electrically bias the first bit lines at a first bit line erase voltage and the second bit lines at a second bit line erase voltage during an erase operation. The first bit line erase voltage is greater than the second bit line erase voltage.

IPC Classes  ?

  • H01L 27/11578 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • G11C 16/14 - Circuits for erasing electrically, e.g. erase voltage switching circuits
  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 21/768 - Applying interconnections to be used for carrying current between separate components within a device

51.

THREE-DIMENSIONAL MEMORY DEVICE CONTAINING A CAPPED ISOLATION TRENCH FILL STRUCTURE AND METHODS OF MAKING THE SAME

      
Application Number US2022027244
Publication Number 2023/287475
Status In Force
Filing Date 2022-05-02
Publication Date 2023-01-19
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor Otsu, Yoshitaka

Abstract

A semiconductor structure includes semiconductor devices located on a top surface of a substrate semiconductor layer, lower-level metal interconnect structures embedded in lower-level dielectric material layers, source-level material layers, an alternating stack of insulating layers and electrically conductive layers overlying the source-level material layer, memory stack structures, a vertically alternating sequence of insulating plates and dielectric material plates laterally surrounded by the alternating stack, an isolation trench fill structure interposed between the alternating stack and the vertically alternating sequence and including a trench fill material portion and a capping dielectric structure overlying the trench fill material portion, and a first through-memory-level interconnection via structure vertically extending through each plate within the vertically alternating sequence and contacting a top surface of one of the lower-level metal interconnect structures.

IPC Classes  ?

  • H01L 23/522 - Arrangements for conducting electric current within the device in operation from one component to another including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 21/02 - Manufacture or treatment of semiconductor devices or of parts thereof
  • H01L 21/28 - Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups

52.

THREE-DIMENSIONAL MEMORY DEVICE INCLUDING AIRGAP CONTAINING INSULATING LAYERS AND METHOD OF MAKING THE SAME

      
Application Number US2022027245
Publication Number 2023/287476
Status In Force
Filing Date 2022-05-02
Publication Date 2023-01-19
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Makala, Raghuveer S.
  • Kanakamedala, Senaka
  • Sharangpani, Rahul
  • Said, Ramy Nashed Bassely

Abstract

A three-dimensional memory device includes a vertical repetition of multiple instances of a unit layer stack. The unit layer stack includes, in order, an airgap-containing insulating layer, a first interfacial dielectric capping layer, a metal layer, and a second interfacial dielectric capping layer. Memory stack structures extend through the vertical repetition. Each of the memory stack structures includes a vertical semiconductor channel and a vertical stack of memory elements located at levels of the metal layers.

IPC Classes  ?

  • H01L 27/115 - Electrically programmable read-only memories; Multistep manufacturing processes therefor
  • H01L 21/76 - Making of isolation regions between components
  • H01L 21/18 - Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer, carrier concentration layer the devices having semiconductor bodies comprising elements of group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
  • H01L 29/06 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions

53.

NON-VOLATILE MEMORY WITH VARIABLE BITS PER MEMORY CELL

      
Application Number US2022027236
Publication Number 2023/282961
Status In Force
Filing Date 2022-05-02
Publication Date 2023-01-12
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor Yang, Xiang

Abstract

In a three dimensional non-volatile memory structure that etches part of the top of the memory structure (including a portion of the select gates), data is stored on a majority (or all but one) of the word lines as x bits per memory cell while data is stored on a top edge word line that is closest to the etching with variable bits per memory cell. In one example embodiment that implements vertical NAND strings, memory cells connected to the top edge word line and that are on NAND strings adjacent the etching store data as n bits per memory cell and memory cells connected to the top edge word line and that are on NAND strings not adjacent the etching store data as m bits per memory cell, where m>x>n.

IPC Classes  ?

  • G11C 16/08 - Address circuits; Decoders; Word-line control circuits
  • G11C 16/06 - Auxiliary circuits, e.g. for writing into memory
  • G11C 16/10 - Programming or data input circuits

54.

BONDED ASSEMBLY INCLUDING AN AIRGAP CONTAINING BONDING-LEVEL DIELECTRIC LAYER AND METHODS OF FORMING THE SAME

      
Application Number US2022027238
Publication Number 2023/282962
Status In Force
Filing Date 2022-05-02
Publication Date 2023-01-12
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Hou, Lin
  • Rabkin, Peter
  • Rajashekhar, Adarsh
  • Makala, Raghuveer S.
  • Higashitani, Masaaki

Abstract

A bonded assembly includes a first semiconductor die containing a first substrate, first semiconductor devices, and first bonding pads laterally surrounded by a first pad-level dielectric layer. The first pad-level dielectric layer includes at least one first encapsulated airgap located between neighboring pairs of first bonding pads and encapsulated by a first dielectric fill material of the first pad-level dielectric layer. The bonded assembly includes a second semiconductor die containing a second substrate, second semiconductor devices, and second bonding pads laterally surrounded by a second pad-level dielectric layer. Each of the second bonding pads is bonded to a respective one of the first bonding pads.

IPC Classes  ?

  • H01L 21/764 - Air gaps
  • H01L 21/762 - Dielectric regions
  • H01L 21/768 - Applying interconnections to be used for carrying current between separate components within a device
  • H01L 23/00 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details of semiconductor or other solid state devices

55.

THREE-DIMENSIONAL MEMORY ARRAY WITH DUAL-LEVEL PERIPHERAL CIRCUITS AND METHODS FOR FORMING THE SAME

      
Application Number US2022011399
Publication Number 2022/265680
Status In Force
Filing Date 2022-01-06
Publication Date 2022-12-22
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Mizutani, Yuki
  • Toyama, Fumiaki
  • Higashitani, Masaaki

Abstract

A bonded assembly includes a memory die that is bonded to a logic die. The memory die includes a three-dimensional memory array located on a memory-side substrate, memory-side dielectric material layers located on the three-dimensional memory array and embedding memory-side metal interconnect structures and memory-side bonding pads, a backside peripheral circuit located on a backside surface of the memory-side substrate, and backside dielectric material layers located on a backside of the memory-side substrate and embedding backside metal interconnect structures. The logic die includes a logic-side peripheral circuit located on a logic-side substrate, and logic-side dielectric material layers located between the logic-side substrate and the memory die and embedding logic-side metal interconnect structures and logic-side bonding pads that are bonded to a respective one of the memory-side bonding pads.

IPC Classes  ?

  • H01L 27/11526 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the peripheral circuit region
  • H01L 23/00 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details of semiconductor or other solid state devices

56.

HIGH VOLTAGE FIELD EFFECT TRANSISTORS WITH SELF-ALIGNED SILICIDE CONTACTS AND METHODS FOR MAKING THE SAME

      
Application Number US2022013809
Publication Number 2022/265685
Status In Force
Filing Date 2022-01-26
Publication Date 2022-12-22
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Akaiwa, Jun
  • Nakatsuji, Hiroshi
  • Ishida, Masashi
  • Togo, Mitsuhiro

Abstract

A field effect transistor includes a source region and a drain region formed within and/or above openings in a dielectric capping mask layer overlying a semiconductor substrate and a gate electrode. A source-side silicide portion and a drain-side silicide portion are self-aligned to the source region and to the drain region, respectively.

IPC Classes  ?

  • H01L 29/40 - Electrodes
  • H01L 29/66 - Types of semiconductor device
  • H01L 29/49 - Metal-insulator semiconductor electrodes
  • H01L 29/08 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions with semiconductor regions connected to an electrode carrying current to be rectified, amplified, or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
  • H01L 29/423 - Electrodes characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched

57.

THREE-DIMENSIONAL MEMORY DEVICE AND METHOD OF MAKING THEREOF USING DOUBLE PITCH WORD LINE FORMATION

      
Application Number US2022013971
Publication Number 2022/265686
Status In Force
Filing Date 2022-01-27
Publication Date 2022-12-22
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Takeguchi, Naoki
  • Tsutsumi, Masanori
  • Shimabukuro, Seiji
  • Hinoue, Tatsuya

Abstract

A three-dimensional memory device includes a vertical repetition of multiple instances of a unit layer stack, memory openings vertically extending through the vertical repetition, and memory opening fill structures located within the memory openings. Each of the memory opening fill structures contains a respective vertical stack of memory elements. The unit layer stack includes, from bottom to top or from top to bottom, a cavity-free insulating layer that is free of any cavity therein, a first-type electrically conductive layer, a cavity-containing insulating layer including an encapsulated cavity therein, and a second-type electrically conductive layer.

IPC Classes  ?

  • H01L 27/115 - Electrically programmable read-only memories; Multistep manufacturing processes therefor
  • H01L 21/3065 - Plasma etching; Reactive-ion etching
  • H01L 21/311 - Etching the insulating layers
  • H01L 21/441 - Deposition of conductive or insulating materials for electrodes
  • H01L 21/443 - Deposition of conductive or insulating materials for electrodes from a gas or vapour, e.g. condensation
  • H01L 21/768 - Applying interconnections to be used for carrying current between separate components within a device
  • H01L 27/06 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including a plurality of individual components in a non-repetitive configuration
  • H01L 27/108 - Dynamic random access memory structures
  • H01L 29/49 - Metal-insulator semiconductor electrodes

58.

THREE-DIMENSIONAL MEMORY DEVICE WITH VERTICAL WORD LINE BARRIER AND METHODS FOR FORMING THE SAME

      
Application Number US2021065375
Publication Number 2022/260708
Status In Force
Filing Date 2021-12-28
Publication Date 2022-12-15
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Sharangpani, Rahul
  • Makala, Raghuveer S.
  • Zhou, Fei
  • Rajashekhar, Adarsh

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers, memory openings vertically extending through the alternating stack, and memory opening fill structures located within the memory openings. Each of the electrically conductive layers includes a metallic fill material layer and a plurality of vertical tubular metallic liners laterally surrounding a respective one of the memory opening fill structures and located between the metallic fill material layer and a respective one of the memory opening fill structures. The tubular metallic liners may be formed by selective metal or metal oxide deposition, or by conversion of surface portions of the metallic fill material layers into metallic compound material portions by nitridation, oxidation, or incorporation of boron atoms.

IPC Classes  ?

  • H01L 23/522 - Arrangements for conducting electric current within the device in operation from one component to another including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
  • H01L 21/28 - Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups
  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11519 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the top-view layout
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout

59.

THREE-DIMENSIONAL MEMORY DEVICE CONTAINING SELF-ALIGNED BIT LINE CONTACTS AND METHODS FOR FORMING THE SAME

      
Application Number US2022011032
Publication Number 2022/260710
Status In Force
Filing Date 2022-01-03
Publication Date 2022-12-15
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Amano, Fumitaka
  • Osawa, Yusuke
  • Ishikawa, Kensuke
  • Mushiga, Mitsuteru
  • Kawasaki, Motoki
  • Yada, Shinsuke
  • Miyamoto, Masato
  • Fukata, Syo
  • Kashimura, Takashi
  • Fujino, Shigehiro

Abstract

A vertical layer stack including a bit-line-level dielectric layer and an etch stop dielectric layer can be formed over an array region. Bit-line trenches are formed through the vertical layer stack. Bit-line-trench fill structures are formed in the bit-line trenches. Each of the bit-line-trench fill structures includes a stack of a bit line and a capping dielectric strip. At least one via-level dielectric layer can be formed over the vertical layer stack. A bit-line-contact via cavity can be formed through the at least one via-level dielectric layer and one of the capping dielectric strips. A bit-line-contact via structure formed in the bit-line-contact via cavity includes a stepped bottom surface including a top surface of one of the bit lines, a sidewall segment of the etch stop dielectric layer, and a segment of a top surface of the etch stop dielectric layer.

IPC Classes  ?

  • H01L 23/522 - Arrangements for conducting electric current within the device in operation from one component to another including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
  • H01L 21/768 - Applying interconnections to be used for carrying current between separate components within a device

60.

THREE-DIMENSIONAL MEMORY DEVICE WITH FINNED SUPPORT PILLAR STRUCTURES AND METHODS FOR FORMING THE SAME

      
Application Number US2021065392
Publication Number 2022/250737
Status In Force
Filing Date 2021-12-28
Publication Date 2022-12-01
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Shimabukuro, Seiji
  • Yamaha, Takashi

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers located over a substrate, memory openings vertically extending through a first region of the alternating stack, memory opening fill structures located in the memory openings, and support pillar structures vertically extending through a second region of the alternating stack. Each of the support pillar structures includes a central columnar structure and a set of fins laterally protruding from the central columnar structure at levels of a subset of the electrically conductive layers.

IPC Classes  ?

  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11519 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the top-view layout
  • H01L 27/11529 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the peripheral circuit region of memory regions comprising cell select transistors, e.g. NAND
  • H01L 27/11558 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate the control gate being a doped region, e.g. single-poly memory cells
  • H01L 27/11573 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the peripheral circuit region

61.

THREE-DIMENSIONAL MEMORY DEVICE INCLUDING LOW-K DRAIN-SELECT-LEVEL ISOLATION STRUCTURES AND METHODS OF FORMING THE SAME

      
Application Number US2021065390
Publication Number 2022/240446
Status In Force
Filing Date 2021-12-28
Publication Date 2022-11-17
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Zhang, Peng
  • Zhang, Yanli
  • Yang, Xiang
  • Matsuno, Koichi
  • Higashitani, Masaaki
  • Alsmeier, Johann

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers located over a substrate, an array of memory opening fill structures located within an array of memory openings vertically extending through the alternating stack, and a drain-select-level isolation structure vertically extending through drain-select-level electrically conductive layers between two rows of memory opening fill structures. The drain-select-level isolation structure may comprise a low-k dielectric material or an air gap.

IPC Classes  ?

  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 21/762 - Dielectric regions
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout

62.

TRANSISTOR CIRCUITS INCLUDING FRINGELESS TRANSISTORS AND METHOD OF MAKING THE SAME

      
Application Number US2022012579
Publication Number 2022/240452
Status In Force
Filing Date 2022-01-14
Publication Date 2022-11-17
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Iwata, Dai
  • Nakatsuji, Hiroshi
  • Ogawa, Hiroyuki
  • Fujikura, Eiichi
  • Akaiwa, Jun
  • Yuu, Akihiro

Abstract

A first field effect transistor contains a first active region including a source region, a drain region and a channel region located between the source region and the drain region, a first gate dielectric overlying the active region, and a first gate electrode overlying the first gate dielectric. A second field effect transistor contains a second active region including a source region, a drain region and a channel region located between the source region and the drain region, a second gate dielectric overlying the active region, a second gate electrode overlying the second gate dielectric. A trench isolation region surrounds the first and the second active regions. The first field effect transistor includes a fringe region in which the first gate electrode extends past the active region perpendicular to the source region to drain region direction and the second field effect transistor does not include the fringe region.

IPC Classes  ?

  • H01L 21/76 - Making of isolation regions between components
  • H01L 27/088 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate
  • H01L 21/8234 - MIS technology

63.

BONDED ASSEMBLY OF A MEMORY DIE AND A LOGIC DIE INCLUDING LATERALLY SHIFTED BIT-LINE BONDING PADS AND METHODS OF FORMING THE SAME

      
Application Number US2022013285
Publication Number 2022/240454
Status In Force
Filing Date 2022-01-21
Publication Date 2022-11-17
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Toyama, Fumiaki
  • Kim, Jee-Yeon

Abstract

A bonded assembly of a memory die and a logic die is provided. The memory die includes a memory array, a plurality of bit lines, and memory-side bit-line-connection bonding pads. The logic die includes sense amplifiers located in a sense amplifier region, and logic-side bit-line-connection bonding pads located within the sense amplifier region and bonded to a respective one of the memory-side bit-line-connection bonding pads. The sense amplifier region has an areal overlap with a respective first subset the plurality of bit lines in a plan view, while a second subset of the plurality of bit lines does not have an areal overlap with the sense amplifier region in the plan view.

IPC Classes  ?

  • H01L 23/00 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details of semiconductor or other solid state devices
  • H01L 27/11578 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11573 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the peripheral circuit region
  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND
  • G11C 7/12 - Bit line control circuits, e.g. drivers, boosters, pull-up circuits, pull-down circuits, precharging circuits, equalising circuits, for bit lines

64.

CAPACITOR STRUCTURE INCLUDING BONDING PADS AS ELECTRODES AND METHODS OF FORMING THE SAME

      
Application Number US2022013595
Publication Number 2022/240456
Status In Force
Filing Date 2022-01-25
Publication Date 2022-11-17
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Shao, Shiqian
  • Toyama, Fumiaki
  • Rabkin, Peter

Abstract

A semiconductor structure includes a bonded assembly of a first semiconductor die including first metal bonding pads and a second semiconductor die including second metal bonding pads, and a capacitor structure including a first electrode, a second electrode, and a node dielectric. The first electrode includes first bonded pairs of metal bonding pads. The second electrode includes second bonded pairs of metal bonding pads. The node dielectric includes portions dielectric material layers laterally surrounding the metal bonding pads.

IPC Classes  ?

  • H01L 23/522 - Arrangements for conducting electric current within the device in operation from one component to another including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
  • H01L 23/00 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details of semiconductor or other solid state devices

65.

THREE-DIMENSIONAL MEMORY DEVICE WITH METAL-BARRIER-METAL WORD LINES AND METHODS OF MAKING THE SAME

      
Application Number US2021065564
Publication Number 2022/231662
Status In Force
Filing Date 2021-12-29
Publication Date 2022-11-03
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Said, Ramy Nashed Bassely
  • Makala, Raghuveer S.
  • Kanakamedala, Senaka
  • Sharangpani, Rahul

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers, memory openings extending through the alternating stack, and memory opening fill structures located in the memory openings and containing a respective vertical semiconductor channel and a respective memory film. Each of the electrically conductive layers includes a tubular metallic liner in contact with a respective outer sidewall segment of a respective one of the memory opening fill structures, an electrically conductive barrier layer contacting the respective tubular metallic liner and two of the insulating layers, and a metallic fill material layer contacting the electrically conductive barrier layer, and not contacting the tubular metallic liner or any of the insulating layers. The memory opening fill structures are formed after performing a halogen outgassing anneal through the memory openings to reduce or eliminate the halogen outgassing damage in the layers of the memory film.

IPC Classes  ?

  • H01L 27/11587 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with the gate electrodes comprising a layer used for its ferroelectric memory properties, e.g. metal-ferroelectric-semiconductor [MFS] or metal-ferroelectric-metal-insulator-semiconductor [MFMIS] characterised by the top-view layout
  • H01L 27/1159 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with the gate electrodes comprising a layer used for its ferroelectric memory properties, e.g. metal-ferroelectric-semiconductor [MFS] or metal-ferroelectric-metal-insulator-semiconductor [MFMIS] characterised by the memory core region
  • H01L 27/11597 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with the gate electrodes comprising a layer used for its ferroelectric memory properties, e.g. metal-ferroelectric-semiconductor [MFS] or metal-ferroelectric-metal-insulator-semiconductor [MFMIS] characterised by three-dimensional arrangements, e.g. cells on different height levels
  • H01L 27/11519 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the top-view layout
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11548 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 21/28 - Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups
  • H01L 29/792 - Field-effect transistors with field effect produced by an insulated gate with charge trapping gate insulator, e.g. MNOS-memory transistor

66.

BONDED ASSEMBLY EMPLOYING METAL-SEMICONDUCTOR BONDING AND METAL-METAL BONDING AND METHODS OF FORMING THE SAME

      
Application Number US2022012172
Publication Number 2022/231669
Status In Force
Filing Date 2022-01-12
Publication Date 2022-11-03
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Hou, Lin
  • Rabkin, Peter
  • Higashitani, Masaaki

Abstract

A bonded assembly of a first semiconductor die and a second semiconductor die includes first and second semiconductor dies. The first semiconductor die includes first semiconductor devices, first metal interconnect structures embedded in first dielectric material layers, and first metal bonding pads laterally surrounded by a semiconductor material layer. The second semiconductor die includes second semiconductor devices, second metal interconnect structures embedded in second dielectric material layers, and second metal bonding pads that include primary metal bonding pads and auxiliary metal bonding pads. The auxiliary metal bonding pads are bonded to the semiconductor material layer through metal-semiconductor compound portions formed by reaction of surface portions of the semiconductor material layer and an auxiliary metal bonding pad. The primary metal bonding pads are bonded to the first metal bonding pads by metal-to-metal bonding.

IPC Classes  ?

  • H01L 23/00 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details of semiconductor or other solid state devices
  • H01L 23/495 - Lead-frames

67.

THREE-DIMENSIONAL MEMORY DEVICE WITH FINNED SUPPORT PILLAR STRUCTURES AND METHOD OF FORMING THE SAME

      
Application Number US2022013782
Publication Number 2022/231674
Status In Force
Filing Date 2022-01-26
Publication Date 2022-11-03
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Shimomura, Kenichi
  • Matsuno, Koichi
  • Alsmeier, Johann
  • Yu, Jixin

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers located over a substrate, memory opening fill structures including a respective vertical semiconductor channel and a respective memory film, and support pillar structures including a respective dummy vertical semiconductor channel, a respective dummy memory film, and a vertical stack of dielectric spacer fins located at levels of the electrically conductive layers and interposed between the electrically conductive layers and the respective dummy memory film.

IPC Classes  ?

  • H01L 21/311 - Etching the insulating layers
  • H01L 27/11517 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate

68.

THREE-DIMENSIONAL MEMORY DEVICE WITH MULTILEVEL DRAIN-SELECT ELECTRODES AND METHODS FOR FORMING THE SAME

      
Application Number US2022020454
Publication Number 2022/231717
Status In Force
Filing Date 2022-03-15
Publication Date 2022-11-03
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Tobioka, Akihiro
  • Shimizu, Satoshi
  • Cui, Zhixin

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers, where the electrically conductive layers include word-line-level electrically conductive layers and drain-select-level electrically conductive layers located above the word-line-level electrically conductive layers, memory opening fill structures vertically extending through the alternating stack, and drain-select-level contact via structures. A first one of the drain-select level contact structures directly contacts at least a first two of the drain-select-level electrically conductive layers that are vertically spaced apart from each other. A second one of the drain-select level contact structures directly contacts at least a second two of the drain-select-level electrically conductive layers that are vertically spaced apart from each other and which are located below the at least the first two of the drain-select-level electrically conductive layers.

IPC Classes  ?

  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11573 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the peripheral circuit region
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels

69.

THREE-DIMENSIONAL MEMORY DEVICE WITH INTERMETALLIC BARRIER LINER AND METHODS FOR FORMING THE SAME

      
Application Number US2022013284
Publication Number 2022/231672
Status In Force
Filing Date 2022-01-21
Publication Date 2022-11-03
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Sharangpani, Rahul
  • Makala, Raghuveer S.

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers, memory openings vertically extending through the alternating stack, and memory opening fill structures located in the memory openings. Each of the memory opening fill structures includes a vertical stack of memory elements located at levels of the electrically conductive layers. Each of the electrically conductive layers includes a metallic barrier liner containing an intermetallic compound of at least two elements that includes a first metal element including Ta or Ti, and a second metal element including at least one of Al or Mo, and metallic barrier liner containing less than 10 atomic percent of nitrogen and oxygen, and a metallic fill material layer contacting the metallic barrier liner.

IPC Classes  ?

  • H01L 21/768 - Applying interconnections to be used for carrying current between separate components within a device
  • H01L 23/532 - Arrangements for conducting electric current within the device in operation from one component to another including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body characterised by the materials
  • H01B 1/02 - Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys

70.

DUAL SACRIFICIAL MATERIAL REPLACEMENT PROCESS FOR A THREE-DIMENSIONAL MEMORY DEVICE AND STRUCTURE FORMED BY THE SAME

      
Application Number US2022012673
Publication Number 2022/225584
Status In Force
Filing Date 2022-01-17
Publication Date 2022-10-27
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Kitazawa, Keigo
  • Norizuki, Naoto
  • Takuma, Shunsuke

Abstract

A vertical repetition of a unit layer stack includes an insulating layer, a first sacrificial material layer, another insulating layer, and a second sacrificial material layer. A memory opening is formed through the vertical repetition, and a memory opening fill structure is formed in the memory opening. A backside trench is formed through the alternating stack. The first sacrificial material layers are replaced with first electrically conductive layers, and the second sacrificial material layer are replaced with second electrically conductive layers after formation of the first electrically conductive layers.

IPC Classes  ?

  • H01L 21/768 - Applying interconnections to be used for carrying current between separate components within a device
  • H01L 29/66 - Types of semiconductor device

71.

THREE-DIMENSIONAL MEMORY DEVICE INCLUDING SELF-ALIGNED DRAIN-SELECT-LEVEL ISOLATION STRUCTURES AND METHOD OF MAKING THEREOF

      
Application Number US2022012826
Publication Number 2022/225585
Status In Force
Filing Date 2022-01-18
Publication Date 2022-10-27
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Fujimura, Nobuyuki
  • Shimizu, Satoshi
  • Moriyama, Takumi

Abstract

An alternating stack of insulating layers and spacer material layers is formed over a substrate. A plurality of arrays of memory opening fill structures is formed through the alternating stack. A plurality of dielectric plates is formed, which laterally surrounds a respective array of memory opening fill structures. Self-aligned drain-select-level isolation structures are formed between a respective neighboring pair of arrays of memory opening fill structures through gaps between neighboring pairs of the dielectric plates into a subset of layers within the alternating stack. Drain side select gate electrodes are provided from a divided subset of the spacer material layers.

IPC Classes  ?

  • H01L 27/11519 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the top-view layout
  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout
  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels

72.

THREE-DIMENSIONAL MEMORY DEVICE WITH ISOLATED SOURCE STRIPS AND METHOD OF MAKING THE SAME

      
Application Number US2022012620
Publication Number 2022/220897
Status In Force
Filing Date 2022-01-14
Publication Date 2022-10-20
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Iwai, Takaaki
  • Nishida, Akio
  • Tsutsumi, Masanori

Abstract

A memory die includes source-select-level electrically conductive strips laterally spaced apart by source-select-level dielectric isolation structures, an alternating stack of word-line-level electrically conductive layers and insulating layers; and source strips located on an opposite side of the source-select-level electrically conductive strips. Each of the source strips has an areal overlap with only a respective one of the source-select-level electrically conductive strips. Memory stack structures vertically extend through the alternating stack and a respective subset of the source-select-level electrically conductive strips. A logic die may be bonded to the memory die on an opposite side of the source strips. Each source strip is electrically connected to a respective group of memory stack structures laterally surrounded by a respective source-select-level electrically conductive strip.

IPC Classes  ?

  • H01L 27/1158 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels
  • H01L 27/11578 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND

73.

MULTI-LEVEL PROGRAM PULSE FOR PROGRAMMING SINGLE LEVEL MEMORY CELLS TO REDUCE DAMAGE

      
Application Number US2022012212
Publication Number 2022/220896
Status In Force
Filing Date 2022-01-13
Publication Date 2022-10-20
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Yang, Xiang
  • Yuan, Jiahui
  • Prakash, Abhijith

Abstract

Apparatuses and techniques are described for reducing damage to memory cells during single bit per cell programming. An initial program pulse in a single bit per cell program operation has a lower, first program level followed by a higher, second program level. As a result of the lower, first program level, the electric field across the memory cells is reduced. The step up time from the first program level to the second program level can be reduced by concurrently stepping up pass voltages of the adjacent unselected word lines. If an additional program pulse is applied, the step up in the program pulse can be omitted. The magnitude of the first program level can be adjusted based on factors such as temperature, number of program-erase cycles, selected sub-block position and selected word line position.

IPC Classes  ?

  • G11C 11/56 - Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency
  • G11C 16/34 - Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention

74.

THREE-DIMENSIONAL MEMORY DEVICE WITH HYBRID STAIRCASE STRUCTURE AND METHODS OF FORMING THE SAME

      
Application Number US2021065582
Publication Number 2022/216331
Status In Force
Filing Date 2021-12-29
Publication Date 2022-10-13
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor Tobioka, Akihiro

Abstract

A vertically alternating sequence of unit layer stacks is formed over a substrate. Each unit layer stacks includes an insulating layer and a spacer material layer that is formed as, or is subsequently replaced with, a first electrically conductive layer. A 2 x N array of stepped surfaces is formed. Each column of two stepped surfaces other than one column is vertically extended by performing a set of processing sequences at least once. The set of processing sequences includes forming a patterned etch mask layer and etching an unmasked subset of the 2 x N array. One or more patterned etch mask layer has a respective continuous opening including an entire area of a respective 2 x M array of stepped surfaces that is a subset of the 2 x N array of stepped surfaces. Vertical stacks of memory elements are formed through the vertically alternating sequence.

IPC Classes  ?

  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11578 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels

75.

NON-VOLATILE MEMORY WITH DIFFERENT WORD LINE HOOK UP REGIONS BASED ON PASS THROUGH SIGNALS

      
Application Number US2022012541
Publication Number 2022/216341
Status In Force
Filing Date 2022-01-14
Publication Date 2022-10-13
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Shao, Shiqian
  • Toyama, Fumiaki

Abstract

To overcome a shortage of area for horizontal metal lines to connect word line switch transistors to corresponding word lines and for pass through signal lines, it is proposed to implement multiple architectures for the word line hook up regions. For example, some areas of a die will be designed to provide extra horizontal metal lines to connect word line switch transistors to word lines and other areas of the die will be designed to provide extra pass through signal lines.

IPC Classes  ?

  • H01L 27/11526 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the peripheral circuit region
  • H01L 27/11551 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions

76.

NON-VOLATILE MEMORY WITH DIFFERENT USE OF METAL LINES IN WORD LINE HOOK UP REGIONS

      
Application Number US2022012546
Publication Number 2022/216342
Status In Force
Filing Date 2022-01-14
Publication Date 2022-10-13
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Shao, Shiqian
  • Toyama, Fumiaki

Abstract

To overcome a shortage of area for horizontal metal lines to connect word line switch transistors to corresponding word lines and for pass through signal lines, it is proposed to implement multiple architectures for the word line hook up regions. For example, some areas of a die will be designed to provide extra horizontal metal lines to connect word line switch transistors to word lines and other areas of the die will be designed to provide extra pass through signal lines.

IPC Classes  ?

  • G11C 16/04 - Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS
  • G11C 8/08 - Word line control circuits, e.g. drivers, boosters, pull-up circuits, pull-down circuits, precharging circuits, for word lines
  • G11C 16/10 - Programming or data input circuits
  • G11C 16/08 - Address circuits; Decoders; Word-line control circuits
  • H01L 27/11578 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels

77.

THREE-DIMENSIONAL MEMORY DEVICE WITH OFF-CENTER OR REVERSE SLOPE STAIRCASE REGIONS AND METHODS FOR FORMING THE SAME

      
Application Number US2022011879
Publication Number 2022/216337
Status In Force
Filing Date 2022-01-11
Publication Date 2022-10-13
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Tanaka, Hiroyuki
  • Ogawa, Hiroyuki

Abstract

A three-dimensional memory device includes alternating stacks of insulating layers and electrically conductive layers, and memory stack structures vertically extending through a respective one of the alternating stacks and located within the first memory array region and the second memory array region. An inter-array region containing lower and upper staircases is located between the first and the second memory array regions. The first memory array region may have a greater length than the second memory array region, or the lower staircase may generally ascend in an opposite direction from the upper staircase.

IPC Classes  ?

  • H01L 27/11519 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the top-view layout
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11568 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region
  • H01L 27/11553 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels
  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11548 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11578 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions

78.

NON-VOLATILE MEMORY WITH MULTIPLE WELLS FOR WORD LINE SWITCH TRANSISTORS

      
Application Number US2022012535
Publication Number 2022/216340
Status In Force
Filing Date 2022-01-14
Publication Date 2022-10-13
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Shao, Shiqian
  • Toyama, Fumiaki
  • Mizutani, Yuki
  • Dunga, Mohan
  • Rabkin, Peter

Abstract

A non-volatile memory includes a non-volatile memory array comprising blocks of non-volatile memory cells, bit lines connected to the memory cells and word lines connected to the memory cells. Word line switch transistors connect the word lines to voltage sources. The word line switch transistors are positioned in triple wells. Multiple triple wells are utilized and the word line switch transistors are grouped into triple wells based on word line voltage ranges used during the programming process. In one embodiment, for a given block, the word line switch transistors connected to data word lines are positioned in a first triple well and the word line switch transistors connected to selection and dummy word lines are positioned in a second triple well. This structure allows the triple wells to be biased differently.

IPC Classes  ?

  • G11C 16/12 - Programming voltage switching circuits
  • G11C 16/08 - Address circuits; Decoders; Word-line control circuits
  • G11C 8/08 - Word line control circuits, e.g. drivers, boosters, pull-up circuits, pull-down circuits, precharging circuits, for word lines

79.

SEMICONDUCTOR DEVICE CONTAINING BIT LINES SEPARATED BY AIR GAPS AND METHODS FOR FORMING THE SAME

      
Application Number US2021035016
Publication Number 2022/203703
Status In Force
Filing Date 2021-05-28
Publication Date 2022-09-29
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Matsuno, Koichi
  • Higashitani, Masaaki
  • Alsmeier, Johann

Abstract

A semiconductor structure includes a semiconductor device, bit lines electrically connected to the semiconductor device, air gaps located between the bit lines, a capping-level material layer, a via-level dielectric material layer located between the bit lines and the capping-level material layer, and conductive via structures extending through the via-level dielectric material layer and contacting a top surface of a respective one of the bit lines. The capping-level material layer contains cavity-containing openings exposing the air gaps. The capping-level material layer contains protruding portions that extend into peripheral regions of the cavity-containing openings.

IPC Classes  ?

  • H01L 27/11548 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11551 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11578 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11521 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region
  • H01L 27/11568 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region
  • H01L 27/11519 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the top-view layout
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout
  • H01L 21/8234 - MIS technology

80.

COUNTERMEASURE FOR REDUCING PEAK CURRENT DURING PROGRAMMING BY OPTIMIZING TIMING OF LATCH SCAN OPERATIONS

      
Application Number US2021033653
Publication Number 2022/186845
Status In Force
Filing Date 2021-05-21
Publication Date 2022-09-09
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Lien, Yu-Chung
  • Zhang, Fanglin
  • Tseng, Huai-Yuan

Abstract

Apparatuses and techniques are described for avoiding current consumption peaks during a program operation for a memory device. The timing of scan operations of latches is adjusted to avoid overlapping with an increase in word line voltages. The scan operations can include a pre-charge select scan, which identifies memory cells subject to a verify test, and a fill operation for latches of memory cells which fail a verify test in a prior program loop. The pre-charge select scan can occur before the increase in the word line voltages, while the fill operation occurs after the increase in word line voltages. In another approach, the start of the increase in the word line voltages is delayed when a state bit scan is expected to take a relatively long time, e.g., when a verify test is passed in a prior program loop.

IPC Classes  ?

  • G11C 16/08 - Address circuits; Decoders; Word-line control circuits
  • G11C 16/10 - Programming or data input circuits
  • G11C 16/24 - Bit-line control circuits
  • G11C 16/34 - Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
  • G11C 16/26 - Sensing or reading circuits; Data output circuits
  • G11C 7/06 - Sense amplifiers; Associated circuits
  • G11C 16/04 - Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS
  • G01R 31/3185 - Reconfiguring for testing, e.g. LSSD, partitioning

81.

ERASE OPERATION FOR MEMORY DEVICE WITH STAIRCASE WORD LINE VOLTAGE DURING ERASE PULSE

      
Application Number US2021033676
Publication Number 2022/186846
Status In Force
Filing Date 2021-05-21
Publication Date 2022-09-09
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Lien, Yu-Chung
  • Payak, Keyur
  • Tseng, Huai-Yuan

Abstract

Apparatuses and techniques are described for performing an erase operation for a set of memory cells, where the erase operation applies a staircase or multi-level word line voltage concurrent with a fixed level erase pulse to provide multiple channel-to-gate voltages. Current consumption and time are saved compared to applying a multi-level erase voltage to a high capacitance substrate, for example. In one approach, the word line voltage is changed from a positive erase-enable voltage to a negative erase-enable voltage during the multi-level erase pulse. A step size of a next erase pulse can be set to achieve an approximately constant step increase in channel-to-gate voltages of the memory cells.

IPC Classes  ?

  • G11C 16/14 - Circuits for erasing electrically, e.g. erase voltage switching circuits
  • G11C 16/08 - Address circuits; Decoders; Word-line control circuits
  • G11C 16/34 - Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
  • G11C 16/04 - Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS

82.

THREE-DIMENSIONAL MEMORY DEVICE INCLUDING DISCRETE CHARGE STORAGE ELEMENTS WITH LATERALLY-PROTRUDING PROFILES AND METHODS OF MAKING THEREOF

      
Application Number US2021034143
Publication Number 2022/186848
Status In Force
Filing Date 2021-05-26
Publication Date 2022-09-09
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Said, Ramy Nashed Bassely
  • Makala, Raghuveer S.
  • Kanakamedala, Senaka
  • Zhou, Fei

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers located over a substrate, memory openings vertically extending through the alternating stack and having lateral protrusions at levels of the electrically conductive layers, and memory opening fill structures located in the memory openings. Each of the memory opening fill structures includes a vertical semiconductor channel, a dielectric material liner laterally surrounding the vertical semiconductor channel, and a vertical stack of discrete memory elements laterally surrounding the dielectric material liner and located within volumes of the lateral protrusions. Each discrete memory element includes a vertical inner sidewall and a convex or stepped outer sidewall.

IPC Classes  ?

  • H01L 27/11578 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11568 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout

83.

THREE-DIMENSIONAL MEMORY DEVICE INCLUDING DISCRETE CHARGE STORAGE ELEMENTS AND METHODS FOR FORMING THE SAME

      
Application Number US2021035150
Publication Number 2022/186850
Status In Force
Filing Date 2021-06-01
Publication Date 2022-09-09
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Pitner, Xue Bai
  • Makala, Raghuveer S.
  • Zhou, Fei
  • Kanakamedala, Senaka
  • Said, Ramy Nashed Bassely

Abstract

A memory device includes an alternating stack of insulating layers and electrically conductive layers, a memory opening vertically extending through the alternating stack, and memory opening fill structures located in the memory opening and including a vertical semiconductor channel, a dielectric material liner laterally surrounding the vertical semiconductor channel, and a vertical stack of discrete memory elements laterally surrounding the dielectric material liner. A subset of the insulating layers a lower insulating sublayer, an upper insulating sublayer overlying the lower insulating sublayer, and a center insulating sublayer located between and in contact with the lower insulating sublayer and the upper insulating sublayer.

IPC Classes  ?

  • H01L 27/108 - Dynamic random access memory structures
  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels

84.

THREE-DIMENSIONAL MEMORY DEVICE INCLUDING LATERALLY-UNDULATING MEMORY MATERIAL LAYERS AND METHODS FOR FORMING THE SAME

      
Application Number US2021035618
Publication Number 2022/186851
Status In Force
Filing Date 2021-06-03
Publication Date 2022-09-09
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Hinoue, Tatsuya
  • Cui, Zhixin

Abstract

A memory device includes an alternating stack of insulating layers and electrically conductive layers located over a substrate, a memory opening vertically extending through the alternating stack, and a memory opening fill structure located in the memory opening and including a vertical semiconductor channel and a memory material layer. A vertical stack of insulating material portions can be provided at levels of the insulating layers to provide a laterally-undulating profile to the memory material layer. Alternatively, a combination of inner insulating spacers and outer insulating spacers can be employed to provide a laterally-undulating profile to the memory material layer.

IPC Classes  ?

  • H01L 21/768 - Applying interconnections to be used for carrying current between separate components within a device
  • H01L 27/11582 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 27/11556 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
  • H01L 21/02 - Manufacture or treatment of semiconductor devices or of parts thereof
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND

85.

THREE-DIMENSIONAL MEMORY DEVICE WITH PERIPHERAL CIRCUIT LOCATED OVER SUPPORT PILLAR ARRAY AND METHOD OF MAKING THEREOF

      
Application Number US2021037286
Publication Number 2022/182383
Status In Force
Filing Date 2021-06-14
Publication Date 2022-09-01
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Ohya, Shunsuke
  • Fukuno, Sadao
  • Nakamura, Koichi

Abstract

A three-dimensional memory device includes a first alternating stack of first insulating layers and first electrically conductive layers located over a substrate, memory stack structures extending through the first alternating stack, a second alternating stack of second insulating layers and second electrically conductive layers located over the substrate and laterally spaced from the first alternating stack, a contact-level dielectric layer overlying the first alternating stack and the second alternating stack, a planar semiconductor material layer bonded to the contact-level dielectric layer and over an area of the second alternating stack, and field effect transistors located on the planar semiconductor material layer and electrically connected to the first electrically conductive layers.

IPC Classes  ?

  • H01L 27/11573 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the peripheral circuit region
  • H01L 27/11578 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11568 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout
  • H01L 21/8234 - MIS technology
  • H01L 25/065 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , or in a single subclass of , , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group

86.

LATERAL TRANSISTORS FOR SELECTING BLOCKS IN A THREE-DIMENSIONAL MEMORY ARRAY AND METHODS FOR FORMING THE SAME

      
Application Number US2021035959
Publication Number 2022/177592
Status In Force
Filing Date 2021-06-04
Publication Date 2022-08-25
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Tomita, Shogo
  • Yada, Shinsuke

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers, memory opening fill structures including a respective vertical semiconductor channel and a respective vertical stack of memory elements extending through the alternating stack in a memory array region, via contact structures contacting the stepped surfaces of the electrically conductive layers at each step in a staircase region, and a vertical stack of access transistors located between the staircase region and the memory array region.

IPC Classes  ?

  • H01L 27/1157 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11529 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the peripheral circuit region of memory regions comprising cell select transistors, e.g. NAND
  • H01L 27/11519 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the top-view layout
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout
  • H01L 27/11548 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11551 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11578 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels

87.

LATERAL TRANSISTORS FOR SELECTING BLOCKS IN A THREE-DIMENSIONAL MEMORY ARRAY AND METHODS FOR FORMING THE SAME

      
Application Number US2021058675
Publication Number 2022/177615
Status In Force
Filing Date 2021-11-09
Publication Date 2022-08-25
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor Yada, Shinsuke

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers, memory opening fill structures including a respective vertical semiconductor channel and a respective vertical stack of memory elements extending through the alternating stack in a memory array region, via contact structures contacting the stepped surfaces of the electrically conductive layers at each step in a staircase region, and a vertical stack of access transistors located between the staircase region and the memory array region.

IPC Classes  ?

  • H01L 27/11551 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND

88.

THREE-DIMENSIONAL MEMORY DEVICE CONTAINING BRIDGES FOR ENHANCED STRUCTURAL SUPPORT AND METHODS OF FORMING THE SAME

      
Application Number US2021037270
Publication Number 2022/173461
Status In Force
Filing Date 2021-06-14
Publication Date 2022-08-18
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Mizuno, Genta
  • Iizuka, Kenzo
  • Shimizu, Satoshi
  • Izumi, Keisuke
  • Hinoue, Tatsuya
  • Terasawa, Yujin
  • Shimabukuro, Seiji
  • Itou, Ryousuke
  • Zhang, Yanli
  • Alsmeier, Johann
  • Yoshida, Yusuke

Abstract

A three-dimensional memory device includes a first word-line region including a first alternating stack of first word lines and continuous insulating layers, first memory stack structures vertically extending through the first alternating stack, a second word-line region comprising a second alternating stack of second word lines and the continuous insulating layers, second memory stack structures vertically extending through the second alternating stack, plural dielectric separator structures located between the first word-line region and the second word-line region, and at least one bridge region located between the plural dielectric separator structures and between the between the first word-line region and the second word-line region. The continuous insulating layers extend through the at least one bridge region between the first alternating stack in the first word-line region and the second alternating stack in the second word-line region.

IPC Classes  ?

  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11568 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region
  • H01L 27/11578 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11551 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11519 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the top-view layout
  • H01L 27/11521 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region
  • H01L 27/11548 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the boundary region between the core and peripheral circuit regions

89.

BONDED SEMICONDUCTOR DIE ASSEMBLY WITH METAL ALLOY BONDING PADS FOR AND METHODS OF FORMING THE SAME

      
Application Number US2021034090
Publication Number 2022/169475
Status In Force
Filing Date 2021-05-25
Publication Date 2022-08-11
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Hou, Lin
  • Rabkin, Peter
  • Higashitani, Masaaki

Abstract

A bonded assembly includes a first semiconductor die and a second semiconductor die. The first semiconductor die includes first metallic bonding pads embedded in first dielectric material layers, the second semiconductor die includes second metallic bonding pads embedded in second dielectric material layers, the first metallic bonding pads are bonded to a respective one of the second metallic bonding pads; and each of the first metallic bonding pads includes a corrosion barrier layer containing an alloy of a primary bonding metal and at least one corrosion-suppressing element that is different from the primary bonding metal.

IPC Classes  ?

  • H01L 25/065 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , or in a single subclass of , , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group
  • H01L 27/11578 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11526 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the peripheral circuit region
  • H01L 27/11573 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the peripheral circuit region
  • H01L 23/00 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details of semiconductor or other solid state devices
  • H01L 27/11551 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels

90.

THREE-DIMENSIONAL MEMORY DEVICE INCLUDING MULTI-BIT CHARGE STORAGE ELEMENTS AND METHODS FOR FORMING THE SAME

      
Application Number US2021037288
Publication Number 2022/169477
Status In Force
Filing Date 2021-06-14
Publication Date 2022-08-11
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Said, Ramy Nashed Bassely
  • Yuan, Jiahui
  • Kanakamedala, Senaka
  • Makala, Raghuveer S.
  • Lee, Dana

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers located over a substrate, memory stack structures extending through the alternating stack. Each of the memory stack structures includes a vertical semiconductor channel, a tunneling dielectric layer, and a vertical stack of memory elements located at levels of the electrically conductive layers between a respective vertically neighboring pair of the insulating layers. Each of the memory elements includes a first memory material portion, and a second memory material portion that is vertically spaced from and is electrically isolated from the first memory material portion by at least one blocking dielectric material portion.

IPC Classes  ?

  • H01L 27/11521 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region
  • H01L 27/11551 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11548 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the boundary region between the core and peripheral circuit regions

91.

OPTIMIZED PROGRAMMING WITH A SINGLE BIT PER MEMORY CELL AND MULTIPLE BITS PER MEMORY CELL

      
Application Number US2021033647
Publication Number 2022/154824
Status In Force
Filing Date 2021-05-21
Publication Date 2022-07-21
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Zainuddin, Abu Naser
  • Liao, Dongxiang
  • Yuan, Jiahui

Abstract

Apparatuses and techniques are described for optimizing programming in a memory device in which memory cells can be programmed using single bit per cell programming and multiple bits per cell programming. In one aspect, a single bit per cell program operation is performed which reduces damage to the memory cells as well as reducing program time. The program operation can omit a pre-charge phase and a verify phase of an initial program loop of a program operation. Instead, a program phase is performed followed by a recovery phase. In one or more subsequent program loops of the single bit per cell program operation, as well as in each program loop of a multiple bit per cell program operation, the program loop includes a pre-charge phase, a program phase, a recovery phase and a verify phase.

IPC Classes  ?

  • G11C 16/08 - Address circuits; Decoders; Word-line control circuits
  • G11C 16/04 - Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS
  • G11C 16/10 - Programming or data input circuits
  • G11C 16/34 - Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
  • H01L 27/11524 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region with cell select transistors, e.g. NAND
  • H01L 27/11526 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the peripheral circuit region

92.

THREE-DIMENSIONAL MEMORY DEVICE WITH BACKSIDE SUPPORT PILLAR STRUCTURES AND METHODS OF FORMING THE SAME

      
Application Number US2021035784
Publication Number 2022/154826
Status In Force
Filing Date 2021-06-03
Publication Date 2022-07-21
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Takuma, Shunsuke
  • Totoki, Yuji
  • Shimabukuro, Seiji
  • Hinoue, Tatsuya
  • Kajiwara, Kengo
  • Tobioka, Akihiro

Abstract

At least one vertically alternating sequence of continuous insulating layers and continuous sacrificial material layers is formed over a substrate. Rows of backside support pillar structures are formed through the at least one vertically alternating sequence. Memory stack structures are formed through the at least one vertically alternating sequence. A two-dimensional array of discrete backside trenches is formed through the at least one vertically alternating sequence. Contiguous combinations of a subset of the backside trenches and a subset of the backside support pillar structures divide the at least one vertically alternating sequence into alternating stacks of insulating layers and sacrificial material layers. The sacrificial material layers are replaced with electrically conductive layers while the backside support pillar structures provide structural support to the insulating layers.

IPC Classes  ?

  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11578 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11568 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout

93.

THREE-DIMENSIONAL FERROELECTRIC MEMORY DEVICE CONTAINING LATTICE-MATCHED TEMPLATES AND METHODS OF MAKING THE SAME

      
Application Number US2021036870
Publication Number 2022/154827
Status In Force
Filing Date 2021-06-10
Publication Date 2022-07-21
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Sharangpani, Rahul
  • Makala, Raghuveer S.
  • Zhou, Fei
  • Rajashekhar, Adarsh

Abstract

A ferroelectric memory device includes an alternating stack of insulating layers and electrically conductive layers, a memory opening vertically extending through the alternating stack, and a memory opening fill structure located in the memory opening and containing a vertical stack of memory elements and a vertical semiconductor channel. Each memory element within the vertical stack of memory elements includes a crystalline ferroelectric memory material portion and an epitaxial template portion.

IPC Classes  ?

  • H01L 27/11597 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with the gate electrodes comprising a layer used for its ferroelectric memory properties, e.g. metal-ferroelectric-semiconductor [MFS] or metal-ferroelectric-metal-insulator-semiconductor [MFMIS] characterised by three-dimensional arrangements, e.g. cells on different height levels
  • H01L 27/1159 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with the gate electrodes comprising a layer used for its ferroelectric memory properties, e.g. metal-ferroelectric-semiconductor [MFS] or metal-ferroelectric-metal-insulator-semiconductor [MFMIS] characterised by the memory core region
  • H01L 27/11587 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with the gate electrodes comprising a layer used for its ferroelectric memory properties, e.g. metal-ferroelectric-semiconductor [MFS] or metal-ferroelectric-metal-insulator-semiconductor [MFMIS] characterised by the top-view layout
  • H01L 29/66 - Types of semiconductor device
  • H01L 29/78 - Field-effect transistors with field effect produced by an insulated gate

94.

MULTIBIT FERROELECTRIC MEMORY CELLS AND METHODS FOR FORMING THE SAME

      
Application Number US2021036868
Publication Number 2022/132225
Status In Force
Filing Date 2021-06-10
Publication Date 2022-06-23
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Tirukkonda, Roshan
  • Said, Ramy Nashed Bassely
  • Kanakamedala, Senaka
  • Sharangpani, Rahul
  • Makala, Raghuveer S.
  • Rajashekhar, Adarsh
  • Zhou, Fei

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers and memory stack structures vertically extending through the alternating stack. Each of the memory stack structures includes a vertical semiconductor channel and a vertical stack of ferroelectric memory elements surrounding the vertical semiconductor channel and located at levels of the electrically conductive layers. Each of the ferroelectric memory elements includes a respective vertical stack of a first ferroelectric material portion and a second ferroelectric material portion that differs from the first ferroelectric material portion by at least one of a material composition and a lateral thickness.

IPC Classes  ?

  • H01L 27/11597 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with the gate electrodes comprising a layer used for its ferroelectric memory properties, e.g. metal-ferroelectric-semiconductor [MFS] or metal-ferroelectric-metal-insulator-semiconductor [MFMIS] characterised by three-dimensional arrangements, e.g. cells on different height levels
  • H01L 27/1159 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with the gate electrodes comprising a layer used for its ferroelectric memory properties, e.g. metal-ferroelectric-semiconductor [MFS] or metal-ferroelectric-metal-insulator-semiconductor [MFMIS] characterised by the memory core region
  • H01L 27/11595 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with the gate electrodes comprising a layer used for its ferroelectric memory properties, e.g. metal-ferroelectric-semiconductor [MFS] or metal-ferroelectric-metal-insulator-semiconductor [MFMIS] characterised by the boundary region between core and peripheral circuit regions
  • H01L 27/11587 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with the gate electrodes comprising a layer used for its ferroelectric memory properties, e.g. metal-ferroelectric-semiconductor [MFS] or metal-ferroelectric-metal-insulator-semiconductor [MFMIS] characterised by the top-view layout

95.

COUNTERMEASURE FOR REDUCING PEAK CURRENT DURING PROGRAM OPERATION UNDER FIRST READ CONDITION

      
Application Number US2021033818
Publication Number 2022/125142
Status In Force
Filing Date 2021-05-24
Publication Date 2022-06-16
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Lien, Yu-Chung
  • Tseng, Huai-Yuan
  • Dutta, Deepanshu

Abstract

Apparatuses and techniques are described for reducing a peak current consumption during a program operation for a memory device. A higher current peak occurs in a first program loop of the program operation when a set of word lines is in a discharged state, also referred to as a first read condition. A current reduction countermeasure can be used when ramping up voltages of unselected word lines to a read pass voltage during the verify phase of the program loop. The countermeasure can involve reducing the ramp up rate, reducing the read pass voltage, or delaying the start of the ramp up for a portion of the word lines.

IPC Classes  ?

  • G06F 1/3234 - Power saving characterised by the action undertaken
  • G11C 16/10 - Programming or data input circuits
  • G06F 3/06 - Digital input from, or digital output to, record carriers
  • G11C 16/30 - Power supply circuits

96.

THREE-DIMENSIONAL MEMORY DEVICE INCLUDING BACKSIDE TRENCH SUPPORT STRUCTURES AND METHODS OF FORMING THE SAME

      
Application Number US2021035847
Publication Number 2022/125143
Status In Force
Filing Date 2021-06-04
Publication Date 2022-06-16
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Matsuno, Koichi
  • Yu, Jixin
  • Alsmeier, Johann

Abstract

A three-dimensional memory device includes layer stacks located over a substrate and laterally spaced apart from each other by backside trenches. Each of the layer stacks includes a respective alternating stack of insulating layers and electrically conductive layers. Memory openings vertically extend through a respective one of the alternating stacks and are filled with a respective memory opening fill structure. Each of the memory opening fill structures includes a respective vertical semiconductor channel and a respective vertical stack of memory elements. Each backside trench fill structure includes a respective row of backside trench bridge structures that are more distal from the substrate than a most distal one of the electrically conductive layers is from the substrate. The backside trench bridge structures can provide structural support during a replacement process that forms the electrically conductive layers.

IPC Classes  ?

  • H01L 27/11578 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11551 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11548 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11568 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region
  • H01L 27/11521 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region

97.

MEMORY DIE WITH SOURCE SIDE OF THREE-DIMENSIONAL MEMORY ARRAY BONDED TO LOGIC DIE AND METHODS OF MAKING THE SAME

      
Application Number US2021036564
Publication Number 2022/125145
Status In Force
Filing Date 2021-06-09
Publication Date 2022-06-16
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Hosoda, Naohiro
  • Tsutsumi, Masanori
  • Funayama, Kota
  • Nagamine, Sayako

Abstract

A memory die includes an alternating stack of insulating layers and electrically conductive layers located between a drain-side dielectric layer and a source-side dielectric layer. Memory openings vertically extend through the alternating stack. Each of the memory openings has a greater lateral dimension an interface with the source-side dielectric layer than at an interface with the drain-side dielectric layer. Memory opening fill structures are located in the memory openings. Each of the memory opening fill structures includes a vertical semiconductor channel, a vertical stack of memory elements, and a drain region. A logic die may be bonded to a source-side dielectric layer side of the memory die.

IPC Classes  ?

  • H01L 27/11521 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the memory core region
  • H01L 27/11551 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11578 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels
  • H01L 27/11568 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the memory core region
  • H01L 27/11548 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 25/065 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , or in a single subclass of , , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group

98.

INTERFACIAL TILT-RESISTANT BONDED ASSEMBLY AND METHODS FOR FORMING THE SAME

      
Application Number US2021035845
Publication Number 2022/115128
Status In Force
Filing Date 2021-06-04
Publication Date 2022-06-02
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Hou, Lin
  • Rabkin, Peter
  • Chen, Yangyin
  • Higashitani, Masaaki

Abstract

A first bonding unit is provided, which includes a first substrate, a first passivation dielectric layer, and first bonding pads. A second bonding unit is provided, which includes a second substrate, a second passivation dielectric layer, and second bonding pads including bonding pillar structures. Solder material portions are formed on physically exposed surfaces of the first bonding pads. The second bonding unit is attached to the first bonding unit by bonding the at least one of the bonding pillar structures to a respective solder material portion.

IPC Classes  ?

  • H01L 23/00 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details of semiconductor or other solid state devices
  • H01L 25/10 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , or in a single subclass of , , e.g. assemblies of rectifier diodes the devices having separate containers

99.

THREE-DIMENSIONAL MEMORY DEVICE CONTAINING OXIDATION-RESISTANT CONTACT STRUCTURES AND METHODS OF MAKING THE SAME

      
Application Number US2021035559
Publication Number 2022/108623
Status In Force
Filing Date 2021-06-03
Publication Date 2022-05-27
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Takii, Eisuke
  • Hashimoto, Hiraku
  • Koyama, Shin

Abstract

A semiconductor structure includes semiconductor devices located on a top surface of a substrate semiconductor layer, lower-level metal interconnect structures, source-level material layers, and a three-dimensional memory array including an alternating stack of insulating layers and electrically conductive layers and memory stack structures vertically extending through the alternating stack and comprising a respective vertical semiconductor channel and a respective memory film. A vertically alternating sequence of insulating plates and dielectric material plates is laterally surrounded by the alternating stack. A through-memory-level interconnection via structure vertically extends through each plate within the vertically alternating sequence and contacts a center portion of a top surface of one of the lower-level metal interconnect structures. At least one silicon nitride liner prevents or reduces oxidation of the lower-level metal interconnect structures underneath the through-memory-level interconnection via structure.

IPC Classes  ?

  • H01L 23/522 - Arrangements for conducting electric current within the device in operation from one component to another including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
  • H01L 27/11575 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the boundary region between the core and peripheral circuit regions
  • H01L 27/11565 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the top-view layout
  • H01L 27/11573 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by the peripheral circuit region
  • H01L 27/11529 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the peripheral circuit region of memory regions comprising cell select transistors, e.g. NAND
  • H01L 27/11526 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with floating gate characterised by the peripheral circuit region

100.

THREE-DIMENSIONAL MEMORY DEVICE WITH SEPARATED SOURCE-SIDE LINES AND METHOD OF MAKING THE SAME

      
Application Number US2021036437
Publication Number 2022/108624
Status In Force
Filing Date 2021-06-08
Publication Date 2022-05-27
Owner SANDISK TECHNOLOGIES LLC (USA)
Inventor
  • Tsutsumi, Masanori
  • Yada, Shinsuke
  • Mushiga, Mitsuteru
  • Nishida, Akio
  • Ogawa, Hiroyuki
  • Okina, Teruo

Abstract

A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers located over at least one source layer, and groups of memory opening fill structures vertically extending through the alternating stack. Each memory opening fill structure can include a vertical stack of memory elements and a vertical semiconductor channel. A plurality of source-side select gate electrodes can be laterally spaced apart by source-select-level dielectric isolation structures. Alternatively or additionally, the at least one source layer may include a plurality of source layers. A group of memory opening fill structures can be selected by selecting a source layer and/or by selecting a source-level electrically conductive layer.

IPC Classes  ?

  • H01L 27/115 - Electrically programmable read-only memories; Multistep manufacturing processes therefor
  • H01L 21/76 - Making of isolation regions between components
  • H01L 27/11578 - Electrically programmable read-only memories; Multistep manufacturing processes therefor with charge-trapping gate insulators, e.g. MNOS or NROM characterised by three-dimensional arrangements, e.g. with cells on different height levels
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